/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_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 18:21:33,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 18:21:33,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 18:21:33,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 18:21:33,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 18:21:33,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 18:21:33,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 18:21:33,702 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 18:21:33,736 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 18:21:33,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 18:21:33,736 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 18:21:33,737 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 18:21:33,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 18:21:33,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 18:21:33,738 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 18:21:33,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 18:21:33,738 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 18:21:33,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 18:21:33,741 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 18:21:33,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 18:21:33,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 18:21:33,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 18:21:33,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 18:21:33,742 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 18:21:33,742 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 18:21:33,742 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 18:21:33,742 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 18:21:33,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 18:21:33,742 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 18:21:33,742 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 18:21:33,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 18:21:33,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 18:21:33,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 18:21:33,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 18:21:33,743 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 18:21:33,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 18:21:33,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 18:21:33,743 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 18:21:33,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 18:21:33,744 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 18:21:34,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 18:21:34,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 18:21:34,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 18:21:34,104 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-13 18:21:34,105 INFO L275 PluginConnector]: CDTParser initialized [2021-07-13 18:21:34,105 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-2.i [2021-07-13 18:21:34,163 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f7db7b45/e439d2795c9b4fe09d5ecba559d9066d/FLAGebf3fe0a9 [2021-07-13 18:21:34,665 INFO L306 CDTParser]: Found 1 translation units. [2021-07-13 18:21:34,665 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i [2021-07-13 18:21:34,682 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f7db7b45/e439d2795c9b4fe09d5ecba559d9066d/FLAGebf3fe0a9 [2021-07-13 18:21:35,139 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f7db7b45/e439d2795c9b4fe09d5ecba559d9066d [2021-07-13 18:21:35,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 18:21:35,143 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-13 18:21:35,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-13 18:21:35,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-13 18:21:35,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-13 18:21:35,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:21:35" (1/1) ... [2021-07-13 18:21:35,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@98907ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:35, skipping insertion in model container [2021-07-13 18:21:35,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:21:35" (1/1) ... [2021-07-13 18:21:35,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-13 18:21:35,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-13 18:21:35,516 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_longer-2.i[41529,41542] [2021-07-13 18:21:35,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-13 18:21:35,542 INFO L203 MainTranslator]: Completed pre-run [2021-07-13 18:21:35,575 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_longer-2.i[41529,41542] [2021-07-13 18:21:35,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-13 18:21:35,664 INFO L208 MainTranslator]: Completed translation [2021-07-13 18:21:35,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:35 WrapperNode [2021-07-13 18:21:35,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-13 18:21:35,666 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 18:21:35,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 18:21:35,666 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 18:21:35,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:35" (1/1) ... [2021-07-13 18:21:35,689 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:35" (1/1) ... [2021-07-13 18:21:35,707 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 18:21:35,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 18:21:35,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 18:21:35,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 18:21:35,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:35" (1/1) ... [2021-07-13 18:21:35,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:35" (1/1) ... [2021-07-13 18:21:35,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:35" (1/1) ... [2021-07-13 18:21:35,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:35" (1/1) ... [2021-07-13 18:21:35,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:35" (1/1) ... [2021-07-13 18:21:35,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:35" (1/1) ... [2021-07-13 18:21:35,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:35" (1/1) ... [2021-07-13 18:21:35,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 18:21:35,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 18:21:35,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 18:21:35,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 18:21:35,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:35" (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 18:21:35,798 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-07-13 18:21:35,798 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-07-13 18:21:35,798 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-07-13 18:21:35,799 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-07-13 18:21:35,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-13 18:21:35,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-13 18:21:35,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-13 18:21:35,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-13 18:21:35,799 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2021-07-13 18:21:35,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-13 18:21:35,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 18:21:35,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 18:21:35,800 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 18:21:36,398 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 18:21:36,399 INFO L299 CfgBuilder]: Removed 24 assume(true) statements. [2021-07-13 18:21:36,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:21:36 BoogieIcfgContainer [2021-07-13 18:21:36,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 18:21:36,403 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 18:21:36,403 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 18:21:36,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 18:21:36,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 06:21:35" (1/3) ... [2021-07-13 18:21:36,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be7395f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:21:36, skipping insertion in model container [2021-07-13 18:21:36,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:35" (2/3) ... [2021-07-13 18:21:36,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be7395f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:21:36, skipping insertion in model container [2021-07-13 18:21:36,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:21:36" (3/3) ... [2021-07-13 18:21:36,410 INFO L111 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2021-07-13 18:21:36,415 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 18:21:36,415 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 18:21:36,415 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-07-13 18:21:36,416 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 18:21:36,457 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,458 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,458 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,458 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,459 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,459 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,459 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,459 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,459 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,460 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,460 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,460 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,460 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,460 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,460 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,460 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,461 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,461 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,461 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,461 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,461 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,461 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,461 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,462 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,463 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,463 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,463 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,463 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,463 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,463 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,464 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,464 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,464 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,465 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,465 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,465 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,465 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,465 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,465 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,466 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,466 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,466 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,466 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,466 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,466 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,467 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,467 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,467 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,467 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,467 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,468 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,468 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,468 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,468 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,468 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,469 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,469 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,469 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,469 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,469 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,469 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,470 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,470 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,470 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,470 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,470 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,470 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,470 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,470 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,471 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,471 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,471 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,471 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,471 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,471 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,472 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,472 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,472 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,473 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,473 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,473 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,473 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,474 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,474 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,474 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,474 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,474 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,475 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,475 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,475 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,475 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,475 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,475 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,476 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,476 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,476 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,476 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,477 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,477 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,479 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,479 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,480 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,480 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,484 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,485 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,485 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,485 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,485 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,485 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,485 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,485 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,486 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,486 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,486 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,486 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,486 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,487 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,487 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,487 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,487 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,487 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,487 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,488 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,488 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,488 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,488 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,488 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,488 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,488 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,489 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,489 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,489 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,489 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,489 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,490 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,490 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,491 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,491 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,491 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,491 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,491 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,491 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,492 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,492 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,492 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,492 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,492 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,492 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,493 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,493 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,493 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,493 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,493 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,494 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,494 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,494 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,494 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,494 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,494 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,494 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,495 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,495 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,495 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,496 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,496 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,496 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,496 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,497 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,498 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,498 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,498 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,498 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,498 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,498 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,498 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,498 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,498 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,499 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,499 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,499 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,499 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,499 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,499 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,499 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,499 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,499 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,499 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,500 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,500 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,500 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,500 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,500 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,500 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,500 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,500 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,500 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,501 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,501 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,501 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,501 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,501 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,501 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,501 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,501 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,502 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,502 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,502 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,502 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,502 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,502 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,502 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,503 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,511 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,511 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,512 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,512 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,512 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,512 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,512 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,512 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,512 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,512 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,512 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,512 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,513 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,513 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,513 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,513 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,513 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,513 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,513 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,513 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,513 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,514 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,514 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,514 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,514 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,514 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,514 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,514 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,514 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,514 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,515 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,515 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,515 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,515 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,517 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,517 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,517 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,517 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,517 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,517 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,518 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,518 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,518 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,518 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,518 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,518 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,518 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,518 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,518 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,519 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,519 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,519 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,526 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,526 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,526 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,527 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,527 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,527 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,527 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,527 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,527 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,527 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,527 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,528 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,528 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,528 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,528 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,528 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,528 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,528 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,528 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,528 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,528 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,529 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,529 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:21:36,535 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-13 18:21:36,553 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-13 18:21:36,571 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 18:21:36,572 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 18:21:36,572 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 18:21:36,572 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 18:21:36,572 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 18:21:36,572 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 18:21:36,572 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 18:21:36,572 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == t1Thread1of1ForFork1======== [2021-07-13 18:21:36,582 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 145 places, 150 transitions, 322 flow [2021-07-13 18:21:36,842 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 7813 states, 7811 states have (on average 2.8641659198566125) internal successors, (22372), 7812 states have internal predecessors, (22372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand has 7813 states, 7811 states have (on average 2.8641659198566125) internal successors, (22372), 7812 states have internal predecessors, (22372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:36,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 18:21:36,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:36,929 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 18:21:36,929 INFO L430 AbstractCegarLoop]: === Iteration 1 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:36,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:36,935 INFO L82 PathProgramCache]: Analyzing trace with hash -712665903, now seen corresponding path program 1 times [2021-07-13 18:21:36,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:36,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090667327] [2021-07-13 18:21:36,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:37,253 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 18:21:37,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:37,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090667327] [2021-07-13 18:21:37,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090667327] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:21:37,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:21:37,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 18:21:37,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361367681] [2021-07-13 18:21:37,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 18:21:37,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:37,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 18:21:37,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 18:21:37,305 INFO L87 Difference]: Start difference. First operand has 7813 states, 7811 states have (on average 2.8641659198566125) internal successors, (22372), 7812 states have internal predecessors, (22372), 0 states have call successors, (0), 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 18:21:37,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:37,492 INFO L93 Difference]: Finished difference Result 10818 states and 29690 transitions. [2021-07-13 18:21:37,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 18:21:37,494 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 18:21:37,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:37,577 INFO L225 Difference]: With dead ends: 10818 [2021-07-13 18:21:37,577 INFO L226 Difference]: Without dead ends: 10548 [2021-07-13 18:21:37,578 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 18:21:37,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10548 states. [2021-07-13 18:21:38,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10548 to 10224. [2021-07-13 18:21:38,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10224 states, 10222 states have (on average 2.759929563686167) internal successors, (28212), 10223 states have internal predecessors, (28212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:38,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10224 states to 10224 states and 28212 transitions. [2021-07-13 18:21:38,169 INFO L78 Accepts]: Start accepts. Automaton has 10224 states and 28212 transitions. Word has length 54 [2021-07-13 18:21:38,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:38,170 INFO L482 AbstractCegarLoop]: Abstraction has 10224 states and 28212 transitions. [2021-07-13 18:21:38,171 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 18:21:38,171 INFO L276 IsEmpty]: Start isEmpty. Operand 10224 states and 28212 transitions. [2021-07-13 18:21:38,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-13 18:21:38,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:38,178 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 18:21:38,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 18:21:38,179 INFO L430 AbstractCegarLoop]: === Iteration 2 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:38,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:38,181 INFO L82 PathProgramCache]: Analyzing trace with hash -89293531, now seen corresponding path program 1 times [2021-07-13 18:21:38,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:38,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048230809] [2021-07-13 18:21:38,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:38,300 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 18:21:38,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:38,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048230809] [2021-07-13 18:21:38,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048230809] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:21:38,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:21:38,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 18:21:38,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850094672] [2021-07-13 18:21:38,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 18:21:38,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:38,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 18:21:38,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 18:21:38,306 INFO L87 Difference]: Start difference. First operand 10224 states and 28212 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 18:21:38,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:38,499 INFO L93 Difference]: Finished difference Result 15012 states and 41360 transitions. [2021-07-13 18:21:38,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 18:21:38,500 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 18:21:38,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:38,584 INFO L225 Difference]: With dead ends: 15012 [2021-07-13 18:21:38,585 INFO L226 Difference]: Without dead ends: 15012 [2021-07-13 18:21:38,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 18:21:38,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15012 states. [2021-07-13 18:21:38,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15012 to 10980. [2021-07-13 18:21:38,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10980 states, 10978 states have (on average 2.7589724904354163) internal successors, (30288), 10979 states have internal predecessors, (30288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:39,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10980 states to 10980 states and 30288 transitions. [2021-07-13 18:21:39,067 INFO L78 Accepts]: Start accepts. Automaton has 10980 states and 30288 transitions. Word has length 63 [2021-07-13 18:21:39,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:39,067 INFO L482 AbstractCegarLoop]: Abstraction has 10980 states and 30288 transitions. [2021-07-13 18:21:39,068 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 18:21:39,068 INFO L276 IsEmpty]: Start isEmpty. Operand 10980 states and 30288 transitions. [2021-07-13 18:21:39,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-07-13 18:21:39,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:39,080 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] [2021-07-13 18:21:39,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 18:21:39,080 INFO L430 AbstractCegarLoop]: === Iteration 3 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:39,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:39,081 INFO L82 PathProgramCache]: Analyzing trace with hash -835995566, now seen corresponding path program 1 times [2021-07-13 18:21:39,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:39,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883608921] [2021-07-13 18:21:39,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:39,190 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 18:21:39,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:39,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883608921] [2021-07-13 18:21:39,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883608921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:39,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193400452] [2021-07-13 18:21:39,191 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 18:21:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:39,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 18:21:39,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:39,616 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 18:21:39,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193400452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:39,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:39,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 18:21:39,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991821798] [2021-07-13 18:21:39,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 18:21:39,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:39,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 18:21:39,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 18:21:39,620 INFO L87 Difference]: Start difference. First operand 10980 states and 30288 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:39,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:39,872 INFO L93 Difference]: Finished difference Result 18555 states and 50921 transitions. [2021-07-13 18:21:39,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 18:21:39,872 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-07-13 18:21:39,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:39,937 INFO L225 Difference]: With dead ends: 18555 [2021-07-13 18:21:39,937 INFO L226 Difference]: Without dead ends: 18555 [2021-07-13 18:21:39,937 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-13 18:21:40,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18555 states. [2021-07-13 18:21:40,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18555 to 14604. [2021-07-13 18:21:40,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14604 states, 14602 states have (on average 2.753116011505273) internal successors, (40201), 14603 states have internal predecessors, (40201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:40,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14604 states to 14604 states and 40201 transitions. [2021-07-13 18:21:40,579 INFO L78 Accepts]: Start accepts. Automaton has 14604 states and 40201 transitions. Word has length 88 [2021-07-13 18:21:40,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:40,579 INFO L482 AbstractCegarLoop]: Abstraction has 14604 states and 40201 transitions. [2021-07-13 18:21:40,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:40,580 INFO L276 IsEmpty]: Start isEmpty. Operand 14604 states and 40201 transitions. [2021-07-13 18:21:40,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-07-13 18:21:40,604 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:40,605 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] [2021-07-13 18:21:40,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-13 18:21:40,828 INFO L430 AbstractCegarLoop]: === Iteration 4 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:40,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:40,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1529144013, now seen corresponding path program 1 times [2021-07-13 18:21:40,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:40,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774889478] [2021-07-13 18:21:40,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:40,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 18:21:40,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:40,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774889478] [2021-07-13 18:21:40,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774889478] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:21:40,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:21:40,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 18:21:40,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850160458] [2021-07-13 18:21:40,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 18:21:40,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:40,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 18:21:40,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 18:21:40,896 INFO L87 Difference]: Start difference. First operand 14604 states and 40201 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:40,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:40,941 INFO L93 Difference]: Finished difference Result 6196 states and 15963 transitions. [2021-07-13 18:21:40,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 18:21:40,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-07-13 18:21:40,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:40,957 INFO L225 Difference]: With dead ends: 6196 [2021-07-13 18:21:40,957 INFO L226 Difference]: Without dead ends: 6076 [2021-07-13 18:21:40,957 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 18:21:40,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6076 states. [2021-07-13 18:21:41,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6076 to 5876. [2021-07-13 18:21:41,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5876 states, 5874 states have (on average 2.5718420156622406) internal successors, (15107), 5875 states have internal predecessors, (15107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:41,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5876 states to 5876 states and 15107 transitions. [2021-07-13 18:21:41,091 INFO L78 Accepts]: Start accepts. Automaton has 5876 states and 15107 transitions. Word has length 109 [2021-07-13 18:21:41,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:41,096 INFO L482 AbstractCegarLoop]: Abstraction has 5876 states and 15107 transitions. [2021-07-13 18:21:41,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:41,096 INFO L276 IsEmpty]: Start isEmpty. Operand 5876 states and 15107 transitions. [2021-07-13 18:21:41,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-07-13 18:21:41,197 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:41,198 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:21:41,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 18:21:41,198 INFO L430 AbstractCegarLoop]: === Iteration 5 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:41,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:41,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1832797293, now seen corresponding path program 2 times [2021-07-13 18:21:41,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:41,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305305434] [2021-07-13 18:21:41,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:41,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:41,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305305434] [2021-07-13 18:21:41,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305305434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:41,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061844560] [2021-07-13 18:21:41,291 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 18:21:41,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:21:41,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:41,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 18:21:41,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:41,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061844560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:41,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:41,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 18:21:41,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874829397] [2021-07-13 18:21:41,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 18:21:41,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:41,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 18:21:41,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 18:21:41,626 INFO L87 Difference]: Start difference. First operand 5876 states and 15107 transitions. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:41,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:41,771 INFO L93 Difference]: Finished difference Result 9595 states and 24725 transitions. [2021-07-13 18:21:41,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 18:21:41,771 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-07-13 18:21:41,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:41,845 INFO L225 Difference]: With dead ends: 9595 [2021-07-13 18:21:41,845 INFO L226 Difference]: Without dead ends: 9595 [2021-07-13 18:21:41,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:21:41,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9595 states. [2021-07-13 18:21:41,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9595 to 7678. [2021-07-13 18:21:41,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7678 states, 7676 states have (on average 2.568655549765503) internal successors, (19717), 7677 states have internal predecessors, (19717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:42,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7678 states to 7678 states and 19717 transitions. [2021-07-13 18:21:42,010 INFO L78 Accepts]: Start accepts. Automaton has 7678 states and 19717 transitions. Word has length 122 [2021-07-13 18:21:42,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:42,011 INFO L482 AbstractCegarLoop]: Abstraction has 7678 states and 19717 transitions. [2021-07-13 18:21:42,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:42,011 INFO L276 IsEmpty]: Start isEmpty. Operand 7678 states and 19717 transitions. [2021-07-13 18:21:42,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-07-13 18:21:42,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:42,029 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] [2021-07-13 18:21:42,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:42,245 INFO L430 AbstractCegarLoop]: === Iteration 6 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:42,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:42,245 INFO L82 PathProgramCache]: Analyzing trace with hash 989155091, now seen corresponding path program 1 times [2021-07-13 18:21:42,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:42,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362443149] [2021-07-13 18:21:42,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:42,361 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 18:21:42,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:42,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362443149] [2021-07-13 18:21:42,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362443149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:42,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893469631] [2021-07-13 18:21:42,361 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 18:21:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:42,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 18:21:42,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:42,745 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 18:21:42,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893469631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:42,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:42,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-07-13 18:21:42,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365609897] [2021-07-13 18:21:42,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 18:21:42,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:42,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 18:21:42,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 18:21:42,747 INFO L87 Difference]: Start difference. First operand 7678 states and 19717 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 18:21:42,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:42,987 INFO L93 Difference]: Finished difference Result 11373 states and 29306 transitions. [2021-07-13 18:21:42,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 18:21:42,988 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 123 [2021-07-13 18:21:42,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:43,020 INFO L225 Difference]: With dead ends: 11373 [2021-07-13 18:21:43,020 INFO L226 Difference]: Without dead ends: 11373 [2021-07-13 18:21:43,021 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-13 18:21:43,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11373 states. [2021-07-13 18:21:43,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11373 to 8938. [2021-07-13 18:21:43,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8938 states, 8936 states have (on average 2.5924350940017904) internal successors, (23166), 8937 states have internal predecessors, (23166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:43,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8938 states to 8938 states and 23166 transitions. [2021-07-13 18:21:43,264 INFO L78 Accepts]: Start accepts. Automaton has 8938 states and 23166 transitions. Word has length 123 [2021-07-13 18:21:43,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:43,265 INFO L482 AbstractCegarLoop]: Abstraction has 8938 states and 23166 transitions. [2021-07-13 18:21:43,265 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 18:21:43,265 INFO L276 IsEmpty]: Start isEmpty. Operand 8938 states and 23166 transitions. [2021-07-13 18:21:43,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-07-13 18:21:43,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:43,291 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:21:43,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:43,505 INFO L430 AbstractCegarLoop]: === Iteration 7 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:43,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:43,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1495248532, now seen corresponding path program 3 times [2021-07-13 18:21:43,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:43,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143508581] [2021-07-13 18:21:43,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:43,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:43,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143508581] [2021-07-13 18:21:43,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143508581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:43,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176073019] [2021-07-13 18:21:43,677 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 18:21:43,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 18:21:43,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:43,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 18:21:43,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:44,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176073019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:44,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:44,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 18:21:44,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317767350] [2021-07-13 18:21:44,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 18:21:44,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:44,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 18:21:44,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-13 18:21:44,103 INFO L87 Difference]: Start difference. First operand 8938 states and 23166 transitions. Second operand has 11 states, 11 states have (on average 18.454545454545453) internal successors, (203), 11 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:44,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:44,332 INFO L93 Difference]: Finished difference Result 13937 states and 35971 transitions. [2021-07-13 18:21:44,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 18:21:44,332 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 18.454545454545453) internal successors, (203), 11 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-07-13 18:21:44,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:44,368 INFO L225 Difference]: With dead ends: 13937 [2021-07-13 18:21:44,368 INFO L226 Difference]: Without dead ends: 13937 [2021-07-13 18:21:44,369 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:21:44,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13937 states. [2021-07-13 18:21:44,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13937 to 10740. [2021-07-13 18:21:44,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10740 states, 10738 states have (on average 2.5867014341590613) internal successors, (27776), 10739 states have internal predecessors, (27776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:44,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10740 states to 10740 states and 27776 transitions. [2021-07-13 18:21:44,661 INFO L78 Accepts]: Start accepts. Automaton has 10740 states and 27776 transitions. Word has length 156 [2021-07-13 18:21:44,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:44,662 INFO L482 AbstractCegarLoop]: Abstraction has 10740 states and 27776 transitions. [2021-07-13 18:21:44,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 18.454545454545453) internal successors, (203), 11 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:44,662 INFO L276 IsEmpty]: Start isEmpty. Operand 10740 states and 27776 transitions. [2021-07-13 18:21:44,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-07-13 18:21:44,683 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:44,683 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:21:44,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:44,897 INFO L430 AbstractCegarLoop]: === Iteration 8 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:44,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:44,897 INFO L82 PathProgramCache]: Analyzing trace with hash 43164722, now seen corresponding path program 2 times [2021-07-13 18:21:44,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:44,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582856519] [2021-07-13 18:21:44,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-13 18:21:45,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:45,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582856519] [2021-07-13 18:21:45,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582856519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:45,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635104997] [2021-07-13 18:21:45,012 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 18:21:45,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:21:45,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:45,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 18:21:45,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-13 18:21:45,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635104997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:45,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:45,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 18:21:45,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615746642] [2021-07-13 18:21:45,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 18:21:45,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:45,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 18:21:45,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 18:21:45,416 INFO L87 Difference]: Start difference. First operand 10740 states and 27776 transitions. Second operand has 10 states, 10 states have (on average 20.1) internal successors, (201), 10 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:45,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:45,634 INFO L93 Difference]: Finished difference Result 15875 states and 41000 transitions. [2021-07-13 18:21:45,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 18:21:45,635 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.1) internal successors, (201), 10 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-07-13 18:21:45,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:45,680 INFO L225 Difference]: With dead ends: 15875 [2021-07-13 18:21:45,680 INFO L226 Difference]: Without dead ends: 15875 [2021-07-13 18:21:45,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:21:45,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15875 states. [2021-07-13 18:21:45,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15875 to 12000. [2021-07-13 18:21:45,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12000 states, 11998 states have (on average 2.60251708618103) internal successors, (31225), 11999 states have internal predecessors, (31225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:46,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12000 states to 12000 states and 31225 transitions. [2021-07-13 18:21:46,006 INFO L78 Accepts]: Start accepts. Automaton has 12000 states and 31225 transitions. Word has length 157 [2021-07-13 18:21:46,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:46,007 INFO L482 AbstractCegarLoop]: Abstraction has 12000 states and 31225 transitions. [2021-07-13 18:21:46,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 20.1) internal successors, (201), 10 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:46,007 INFO L276 IsEmpty]: Start isEmpty. Operand 12000 states and 31225 transitions. [2021-07-13 18:21:46,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-07-13 18:21:46,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:46,033 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:21:46,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:46,249 INFO L430 AbstractCegarLoop]: === Iteration 9 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:46,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:46,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1830396245, now seen corresponding path program 4 times [2021-07-13 18:21:46,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:46,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106358191] [2021-07-13 18:21:46,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:46,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:46,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106358191] [2021-07-13 18:21:46,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106358191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:46,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625056636] [2021-07-13 18:21:46,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:21:46,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:21:46,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:46,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 18:21:46,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:46,890 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:46,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625056636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:46,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:46,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-13 18:21:46,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466274384] [2021-07-13 18:21:46,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 18:21:46,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:46,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 18:21:46,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-13 18:21:46,892 INFO L87 Difference]: Start difference. First operand 12000 states and 31225 transitions. Second operand has 13 states, 13 states have (on average 18.23076923076923) internal successors, (237), 13 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:47,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:47,219 INFO L93 Difference]: Finished difference Result 17199 states and 44580 transitions. [2021-07-13 18:21:47,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 18:21:47,220 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 18.23076923076923) internal successors, (237), 13 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-07-13 18:21:47,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:47,257 INFO L225 Difference]: With dead ends: 17199 [2021-07-13 18:21:47,257 INFO L226 Difference]: Without dead ends: 17199 [2021-07-13 18:21:47,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 150.1ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-07-13 18:21:47,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17199 states. [2021-07-13 18:21:47,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17199 to 13802. [2021-07-13 18:21:47,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13802 states, 13800 states have (on average 2.5967391304347824) internal successors, (35835), 13801 states have internal predecessors, (35835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:47,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13802 states to 13802 states and 35835 transitions. [2021-07-13 18:21:47,570 INFO L78 Accepts]: Start accepts. Automaton has 13802 states and 35835 transitions. Word has length 190 [2021-07-13 18:21:47,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:47,570 INFO L482 AbstractCegarLoop]: Abstraction has 13802 states and 35835 transitions. [2021-07-13 18:21:47,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 18.23076923076923) internal successors, (237), 13 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:47,570 INFO L276 IsEmpty]: Start isEmpty. Operand 13802 states and 35835 transitions. [2021-07-13 18:21:47,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-07-13 18:21:47,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:47,596 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:21:47,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:47,800 INFO L430 AbstractCegarLoop]: === Iteration 10 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:47,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:47,801 INFO L82 PathProgramCache]: Analyzing trace with hash 704345301, now seen corresponding path program 3 times [2021-07-13 18:21:47,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:47,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099241082] [2021-07-13 18:21:47,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 136 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-13 18:21:47,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:47,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099241082] [2021-07-13 18:21:47,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099241082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:47,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076519582] [2021-07-13 18:21:47,940 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 18:21:48,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 18:21:48,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:48,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 18:21:48,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 113 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:21:48,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076519582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:48,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:48,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-07-13 18:21:48,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127305838] [2021-07-13 18:21:48,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 18:21:48,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:48,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 18:21:48,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 18:21:48,406 INFO L87 Difference]: Start difference. First operand 13802 states and 35835 transitions. Second operand has 10 states, 10 states have (on average 21.4) internal successors, (214), 10 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:48,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:48,609 INFO L93 Difference]: Finished difference Result 17787 states and 46053 transitions. [2021-07-13 18:21:48,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 18:21:48,610 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 21.4) internal successors, (214), 10 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-07-13 18:21:48,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:48,648 INFO L225 Difference]: With dead ends: 17787 [2021-07-13 18:21:48,648 INFO L226 Difference]: Without dead ends: 17787 [2021-07-13 18:21:48,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:21:48,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17787 states. [2021-07-13 18:21:48,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17787 to 13802. [2021-07-13 18:21:48,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13802 states, 13800 states have (on average 2.5967391304347824) internal successors, (35835), 13801 states have internal predecessors, (35835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13802 states to 13802 states and 35835 transitions. [2021-07-13 18:21:48,982 INFO L78 Accepts]: Start accepts. Automaton has 13802 states and 35835 transitions. Word has length 191 [2021-07-13 18:21:48,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:48,982 INFO L482 AbstractCegarLoop]: Abstraction has 13802 states and 35835 transitions. [2021-07-13 18:21:48,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 21.4) internal successors, (214), 10 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:48,983 INFO L276 IsEmpty]: Start isEmpty. Operand 13802 states and 35835 transitions. [2021-07-13 18:21:49,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-07-13 18:21:49,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:49,009 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:21:49,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 18:21:49,221 INFO L430 AbstractCegarLoop]: === Iteration 11 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:49,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:49,221 INFO L82 PathProgramCache]: Analyzing trace with hash 249164177, now seen corresponding path program 4 times [2021-07-13 18:21:49,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:49,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294954450] [2021-07-13 18:21:49,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 133 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-13 18:21:49,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:49,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294954450] [2021-07-13 18:21:49,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294954450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:49,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135549177] [2021-07-13 18:21:49,339 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 18:21:49,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:21:49,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:49,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 18:21:49,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 133 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-13 18:21:49,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135549177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:49,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:49,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 18:21:49,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384428121] [2021-07-13 18:21:49,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 18:21:49,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:49,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 18:21:49,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-13 18:21:49,805 INFO L87 Difference]: Start difference. First operand 13802 states and 35835 transitions. Second operand has 12 states, 12 states have (on average 19.583333333333332) internal successors, (235), 12 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:50,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:50,069 INFO L93 Difference]: Finished difference Result 19137 states and 49609 transitions. [2021-07-13 18:21:50,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 18:21:50,070 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 19.583333333333332) internal successors, (235), 12 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-07-13 18:21:50,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:50,100 INFO L225 Difference]: With dead ends: 19137 [2021-07-13 18:21:50,101 INFO L226 Difference]: Without dead ends: 19137 [2021-07-13 18:21:50,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2021-07-13 18:21:50,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19137 states. [2021-07-13 18:21:50,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19137 to 13802. [2021-07-13 18:21:50,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13802 states, 13800 states have (on average 2.5967391304347824) internal successors, (35835), 13801 states have internal predecessors, (35835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:50,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13802 states to 13802 states and 35835 transitions. [2021-07-13 18:21:50,419 INFO L78 Accepts]: Start accepts. Automaton has 13802 states and 35835 transitions. Word has length 191 [2021-07-13 18:21:50,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:50,511 INFO L482 AbstractCegarLoop]: Abstraction has 13802 states and 35835 transitions. [2021-07-13 18:21:50,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 19.583333333333332) internal successors, (235), 12 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:50,511 INFO L276 IsEmpty]: Start isEmpty. Operand 13802 states and 35835 transitions. [2021-07-13 18:21:50,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-07-13 18:21:50,539 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:50,539 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, 2, 2, 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 18:21:50,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-13 18:21:50,757 INFO L430 AbstractCegarLoop]: === Iteration 12 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:50,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:50,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1316096157, now seen corresponding path program 1 times [2021-07-13 18:21:50,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:50,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368205264] [2021-07-13 18:21:50,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:50,894 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 9 proven. 148 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-07-13 18:21:50,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:50,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368205264] [2021-07-13 18:21:50,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368205264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:50,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686839241] [2021-07-13 18:21:50,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:21:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:51,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:21:51,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 9 proven. 125 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-07-13 18:21:51,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686839241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:51,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:51,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-07-13 18:21:51,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902569546] [2021-07-13 18:21:51,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 18:21:51,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:51,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 18:21:51,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 18:21:51,356 INFO L87 Difference]: Start difference. First operand 13802 states and 35835 transitions. Second operand has 11 states, 11 states have (on average 20.90909090909091) internal successors, (230), 11 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:51,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:51,598 INFO L93 Difference]: Finished difference Result 24997 states and 64918 transitions. [2021-07-13 18:21:51,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 18:21:51,598 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 20.90909090909091) internal successors, (230), 11 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2021-07-13 18:21:51,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:51,644 INFO L225 Difference]: With dead ends: 24997 [2021-07-13 18:21:51,645 INFO L226 Difference]: Without dead ends: 24997 [2021-07-13 18:21:51,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:21:51,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24997 states. [2021-07-13 18:21:51,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24997 to 14962. [2021-07-13 18:21:51,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14962 states, 14960 states have (on average 2.606216577540107) internal successors, (38989), 14961 states have internal predecessors, (38989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:52,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14962 states to 14962 states and 38989 transitions. [2021-07-13 18:21:52,015 INFO L78 Accepts]: Start accepts. Automaton has 14962 states and 38989 transitions. Word has length 220 [2021-07-13 18:21:52,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:52,016 INFO L482 AbstractCegarLoop]: Abstraction has 14962 states and 38989 transitions. [2021-07-13 18:21:52,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 20.90909090909091) internal successors, (230), 11 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:52,016 INFO L276 IsEmpty]: Start isEmpty. Operand 14962 states and 38989 transitions. [2021-07-13 18:21:52,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-07-13 18:21:52,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:52,042 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:21:52,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:52,257 INFO L430 AbstractCegarLoop]: === Iteration 13 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:52,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:52,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1317035050, now seen corresponding path program 5 times [2021-07-13 18:21:52,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:52,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633695869] [2021-07-13 18:21:52,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:52,406 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:52,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:52,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633695869] [2021-07-13 18:21:52,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633695869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:52,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401259379] [2021-07-13 18:21:52,407 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 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 18:21:52,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 18:21:52,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:52,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:21:52,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:21:52,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401259379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:52,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:52,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-13 18:21:52,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301325212] [2021-07-13 18:21:52,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:21:52,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:52,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:21:52,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:21:52,944 INFO L87 Difference]: Start difference. First operand 14962 states and 38989 transitions. Second operand has 15 states, 15 states have (on average 18.066666666666666) internal successors, (271), 15 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 18:21:53,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:53,258 INFO L93 Difference]: Finished difference Result 20871 states and 54084 transitions. [2021-07-13 18:21:53,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 18:21:53,258 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 18.066666666666666) internal successors, (271), 15 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 224 [2021-07-13 18:21:53,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:53,298 INFO L225 Difference]: With dead ends: 20871 [2021-07-13 18:21:53,298 INFO L226 Difference]: Without dead ends: 20871 [2021-07-13 18:21:53,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 174.0ms TimeCoverageRelationStatistics Valid=241, Invalid=461, Unknown=0, NotChecked=0, Total=702 [2021-07-13 18:21:53,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20871 states. [2021-07-13 18:21:53,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20871 to 16764. [2021-07-13 18:21:53,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16764 states, 16762 states have (on average 2.6010619257845127) internal successors, (43599), 16763 states have internal predecessors, (43599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:53,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16764 states to 16764 states and 43599 transitions. [2021-07-13 18:21:53,615 INFO L78 Accepts]: Start accepts. Automaton has 16764 states and 43599 transitions. Word has length 224 [2021-07-13 18:21:53,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:53,615 INFO L482 AbstractCegarLoop]: Abstraction has 16764 states and 43599 transitions. [2021-07-13 18:21:53,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 18.066666666666666) internal successors, (271), 15 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 18:21:53,615 INFO L276 IsEmpty]: Start isEmpty. Operand 16764 states and 43599 transitions. [2021-07-13 18:21:53,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-07-13 18:21:53,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:53,635 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:21:53,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:21:53,845 INFO L430 AbstractCegarLoop]: === Iteration 14 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:53,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:53,845 INFO L82 PathProgramCache]: Analyzing trace with hash 143431510, now seen corresponding path program 5 times [2021-07-13 18:21:53,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:53,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207828331] [2021-07-13 18:21:53,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:54,078 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 253 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-13 18:21:54,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:54,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207828331] [2021-07-13 18:21:54,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207828331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:54,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686689811] [2021-07-13 18:21:54,079 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 18:21:54,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 18:21:54,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:54,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:21:54,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:54,543 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:21:54,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686689811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:54,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:54,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-07-13 18:21:54,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757225877] [2021-07-13 18:21:54,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 18:21:54,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:54,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 18:21:54,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-13 18:21:54,546 INFO L87 Difference]: Start difference. First operand 16764 states and 43599 transitions. Second operand has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:54,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:54,791 INFO L93 Difference]: Finished difference Result 23844 states and 61943 transitions. [2021-07-13 18:21:54,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 18:21:54,791 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2021-07-13 18:21:54,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:54,830 INFO L225 Difference]: With dead ends: 23844 [2021-07-13 18:21:54,830 INFO L226 Difference]: Without dead ends: 23844 [2021-07-13 18:21:54,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 120.4ms TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:21:54,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23844 states. [2021-07-13 18:21:55,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23844 to 18704. [2021-07-13 18:21:55,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18704 states, 18702 states have (on average 2.6167254839054648) internal successors, (48938), 18703 states have internal predecessors, (48938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:55,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18704 states to 18704 states and 48938 transitions. [2021-07-13 18:21:55,140 INFO L78 Accepts]: Start accepts. Automaton has 18704 states and 48938 transitions. Word has length 225 [2021-07-13 18:21:55,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:55,140 INFO L482 AbstractCegarLoop]: Abstraction has 18704 states and 48938 transitions. [2021-07-13 18:21:55,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:55,141 INFO L276 IsEmpty]: Start isEmpty. Operand 18704 states and 48938 transitions. [2021-07-13 18:21:55,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-07-13 18:21:55,163 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:55,163 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:21:55,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 18:21:55,364 INFO L430 AbstractCegarLoop]: === Iteration 15 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:55,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:55,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1063343500, now seen corresponding path program 6 times [2021-07-13 18:21:55,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:55,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644998702] [2021-07-13 18:21:55,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:55,487 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:21:55,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:55,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644998702] [2021-07-13 18:21:55,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644998702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:55,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079750866] [2021-07-13 18:21:55,487 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 18:21:55,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 18:21:55,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:55,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:21:55,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:56,029 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:21:56,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079750866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:56,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:56,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 18:21:56,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229203302] [2021-07-13 18:21:56,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 18:21:56,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:56,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 18:21:56,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-13 18:21:56,032 INFO L87 Difference]: Start difference. First operand 18704 states and 48938 transitions. Second operand has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:56,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:56,322 INFO L93 Difference]: Finished difference Result 30389 states and 79003 transitions. [2021-07-13 18:21:56,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 18:21:56,323 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2021-07-13 18:21:56,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:56,379 INFO L225 Difference]: With dead ends: 30389 [2021-07-13 18:21:56,379 INFO L226 Difference]: Without dead ends: 30389 [2021-07-13 18:21:56,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:21:56,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30389 states. [2021-07-13 18:21:56,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30389 to 19964. [2021-07-13 18:21:56,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19964 states, 19962 states have (on average 2.624336238853822) internal successors, (52387), 19963 states have internal predecessors, (52387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:56,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19964 states to 19964 states and 52387 transitions. [2021-07-13 18:21:56,886 INFO L78 Accepts]: Start accepts. Automaton has 19964 states and 52387 transitions. Word has length 225 [2021-07-13 18:21:56,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:56,886 INFO L482 AbstractCegarLoop]: Abstraction has 19964 states and 52387 transitions. [2021-07-13 18:21:56,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:56,886 INFO L276 IsEmpty]: Start isEmpty. Operand 19964 states and 52387 transitions. [2021-07-13 18:21:56,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-07-13 18:21:56,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:56,912 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:21:57,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 18:21:57,113 INFO L430 AbstractCegarLoop]: === Iteration 16 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:57,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:57,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1518524624, now seen corresponding path program 7 times [2021-07-13 18:21:57,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:57,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226751760] [2021-07-13 18:21:57,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 250 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-13 18:21:57,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:57,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226751760] [2021-07-13 18:21:57,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226751760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:57,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205121063] [2021-07-13 18:21:57,242 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 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 18:21:57,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:57,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:21:57,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 250 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-13 18:21:57,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205121063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:57,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:57,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-07-13 18:21:57,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836333347] [2021-07-13 18:21:57,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 18:21:57,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:57,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 18:21:57,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 18:21:57,703 INFO L87 Difference]: Start difference. First operand 19964 states and 52387 transitions. Second operand has 14 states, 14 states have (on average 19.214285714285715) internal successors, (269), 14 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:58,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:58,069 INFO L93 Difference]: Finished difference Result 29709 states and 77502 transitions. [2021-07-13 18:21:58,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 18:21:58,070 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 19.214285714285715) internal successors, (269), 14 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2021-07-13 18:21:58,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:58,144 INFO L225 Difference]: With dead ends: 29709 [2021-07-13 18:21:58,145 INFO L226 Difference]: Without dead ends: 29709 [2021-07-13 18:21:58,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 194.4ms TimeCoverageRelationStatistics Valid=206, Invalid=550, Unknown=0, NotChecked=0, Total=756 [2021-07-13 18:21:58,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29709 states. [2021-07-13 18:21:58,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29709 to 19964. [2021-07-13 18:21:58,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19964 states, 19962 states have (on average 2.624336238853822) internal successors, (52387), 19963 states have internal predecessors, (52387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:58,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19964 states to 19964 states and 52387 transitions. [2021-07-13 18:21:58,612 INFO L78 Accepts]: Start accepts. Automaton has 19964 states and 52387 transitions. Word has length 225 [2021-07-13 18:21:58,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:21:58,612 INFO L482 AbstractCegarLoop]: Abstraction has 19964 states and 52387 transitions. [2021-07-13 18:21:58,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 19.214285714285715) internal successors, (269), 14 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:58,612 INFO L276 IsEmpty]: Start isEmpty. Operand 19964 states and 52387 transitions. [2021-07-13 18:21:58,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-07-13 18:21:58,651 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:21:58,651 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, 2, 2, 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 18:21:58,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 18:21:58,853 INFO L430 AbstractCegarLoop]: === Iteration 17 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:21:58,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:21:58,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1023520124, now seen corresponding path program 2 times [2021-07-13 18:21:58,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:21:58,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220333002] [2021-07-13 18:21:58,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:21:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:21:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 12 proven. 265 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-07-13 18:21:59,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:21:59,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220333002] [2021-07-13 18:21:59,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220333002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:59,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284675103] [2021-07-13 18:21:59,009 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 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 18:21:59,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:21:59,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:21:59,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 18:21:59,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:21:59,464 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 12 proven. 242 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-07-13 18:21:59,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284675103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:21:59,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:21:59,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-07-13 18:21:59,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077531823] [2021-07-13 18:21:59,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 18:21:59,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:21:59,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 18:21:59,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 18:21:59,465 INFO L87 Difference]: Start difference. First operand 19964 states and 52387 transitions. Second operand has 13 states, 13 states have (on average 20.307692307692307) internal successors, (264), 13 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:21:59,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:21:59,774 INFO L93 Difference]: Finished difference Result 33419 states and 87480 transitions. [2021-07-13 18:21:59,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 18:21:59,774 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 20.307692307692307) internal successors, (264), 13 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2021-07-13 18:21:59,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:21:59,833 INFO L225 Difference]: With dead ends: 33419 [2021-07-13 18:21:59,834 INFO L226 Difference]: Without dead ends: 33419 [2021-07-13 18:21:59,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 149.4ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-07-13 18:21:59,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33419 states. [2021-07-13 18:22:00,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33419 to 19964. [2021-07-13 18:22:00,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19964 states, 19962 states have (on average 2.624336238853822) internal successors, (52387), 19963 states have internal predecessors, (52387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:00,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19964 states to 19964 states and 52387 transitions. [2021-07-13 18:22:00,216 INFO L78 Accepts]: Start accepts. Automaton has 19964 states and 52387 transitions. Word has length 254 [2021-07-13 18:22:00,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:00,216 INFO L482 AbstractCegarLoop]: Abstraction has 19964 states and 52387 transitions. [2021-07-13 18:22:00,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 20.307692307692307) internal successors, (264), 13 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:00,216 INFO L276 IsEmpty]: Start isEmpty. Operand 19964 states and 52387 transitions. [2021-07-13 18:22:00,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-07-13 18:22:00,242 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:00,242 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, 2, 2, 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 18:22:00,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:00,445 INFO L430 AbstractCegarLoop]: === Iteration 18 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:00,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:00,445 INFO L82 PathProgramCache]: Analyzing trace with hash -378172578, now seen corresponding path program 3 times [2021-07-13 18:22:00,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:00,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574140555] [2021-07-13 18:22:00,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:00,579 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 12 proven. 242 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-07-13 18:22:00,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:00,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574140555] [2021-07-13 18:22:00,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574140555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:00,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085209833] [2021-07-13 18:22:00,580 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 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 18:22:00,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 18:22:00,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:00,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 18:22:00,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:00,973 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-07-13 18:22:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-07-13 18:22:01,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085209833] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:22:01,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 18:22:01,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2021-07-13 18:22:01,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395423322] [2021-07-13 18:22:01,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 18:22:01,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:01,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 18:22:01,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:22:01,222 INFO L87 Difference]: Start difference. First operand 19964 states and 52387 transitions. Second operand has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:01,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:01,414 INFO L93 Difference]: Finished difference Result 26914 states and 70438 transitions. [2021-07-13 18:22:01,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 18:22:01,415 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2021-07-13 18:22:01,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:01,466 INFO L225 Difference]: With dead ends: 26914 [2021-07-13 18:22:01,466 INFO L226 Difference]: Without dead ends: 26914 [2021-07-13 18:22:01,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:22:01,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26914 states. [2021-07-13 18:22:01,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26914 to 20644. [2021-07-13 18:22:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20644 states, 20642 states have (on average 2.627700804185641) internal successors, (54241), 20643 states have internal predecessors, (54241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:01,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20644 states to 20644 states and 54241 transitions. [2021-07-13 18:22:01,810 INFO L78 Accepts]: Start accepts. Automaton has 20644 states and 54241 transitions. Word has length 254 [2021-07-13 18:22:01,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:01,810 INFO L482 AbstractCegarLoop]: Abstraction has 20644 states and 54241 transitions. [2021-07-13 18:22:01,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:01,811 INFO L276 IsEmpty]: Start isEmpty. Operand 20644 states and 54241 transitions. [2021-07-13 18:22:01,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-07-13 18:22:01,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:01,836 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:02,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 18:22:02,041 INFO L430 AbstractCegarLoop]: === Iteration 19 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:02,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:02,041 INFO L82 PathProgramCache]: Analyzing trace with hash -518142441, now seen corresponding path program 6 times [2021-07-13 18:22:02,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:02,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194578939] [2021-07-13 18:22:02,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:02,232 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:02,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:02,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194578939] [2021-07-13 18:22:02,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194578939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:02,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682332204] [2021-07-13 18:22:02,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:02,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 18:22:02,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:02,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 18:22:02,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:02,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682332204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:02,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:02,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 18:22:02,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892994029] [2021-07-13 18:22:02,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:22:02,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:02,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:22:02,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:22:02,824 INFO L87 Difference]: Start difference. First operand 20644 states and 54241 transitions. Second operand has 17 states, 17 states have (on average 17.941176470588236) internal successors, (305), 17 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:03,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:03,148 INFO L93 Difference]: Finished difference Result 27943 states and 72966 transitions. [2021-07-13 18:22:03,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:22:03,148 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 17.941176470588236) internal successors, (305), 17 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 258 [2021-07-13 18:22:03,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:03,200 INFO L225 Difference]: With dead ends: 27943 [2021-07-13 18:22:03,200 INFO L226 Difference]: Without dead ends: 27943 [2021-07-13 18:22:03,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 187.5ms TimeCoverageRelationStatistics Valid=316, Invalid=614, Unknown=0, NotChecked=0, Total=930 [2021-07-13 18:22:03,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27943 states. [2021-07-13 18:22:03,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27943 to 22446. [2021-07-13 18:22:03,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22446 states, 22444 states have (on average 2.62212618071645) internal successors, (58851), 22445 states have internal predecessors, (58851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:03,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22446 states to 22446 states and 58851 transitions. [2021-07-13 18:22:03,617 INFO L78 Accepts]: Start accepts. Automaton has 22446 states and 58851 transitions. Word has length 258 [2021-07-13 18:22:03,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:03,617 INFO L482 AbstractCegarLoop]: Abstraction has 22446 states and 58851 transitions. [2021-07-13 18:22:03,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 17.941176470588236) internal successors, (305), 17 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:03,618 INFO L276 IsEmpty]: Start isEmpty. Operand 22446 states and 58851 transitions. [2021-07-13 18:22:03,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-07-13 18:22:03,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:03,647 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:03,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:03,848 INFO L430 AbstractCegarLoop]: === Iteration 20 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:03,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:03,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1618093673, now seen corresponding path program 8 times [2021-07-13 18:22:03,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:03,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963305785] [2021-07-13 18:22:03,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:03,990 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 404 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-13 18:22:03,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:03,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963305785] [2021-07-13 18:22:03,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963305785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:03,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476973692] [2021-07-13 18:22:03,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:04,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:22:04,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:04,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 18:22:04,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:04,651 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 381 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:22:04,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476973692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:04,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:04,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-07-13 18:22:04,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366951209] [2021-07-13 18:22:04,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 18:22:04,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:04,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 18:22:04,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 18:22:04,653 INFO L87 Difference]: Start difference. First operand 22446 states and 58851 transitions. Second operand has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:04,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:04,921 INFO L93 Difference]: Finished difference Result 29176 states and 76036 transitions. [2021-07-13 18:22:04,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 18:22:04,922 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2021-07-13 18:22:04,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:04,973 INFO L225 Difference]: With dead ends: 29176 [2021-07-13 18:22:04,974 INFO L226 Difference]: Without dead ends: 29176 [2021-07-13 18:22:04,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=194, Invalid=456, Unknown=0, NotChecked=0, Total=650 [2021-07-13 18:22:05,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29176 states. [2021-07-13 18:22:05,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29176 to 23126. [2021-07-13 18:22:05,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23126 states, 23124 states have (on average 2.626751427088739) internal successors, (60741), 23125 states have internal predecessors, (60741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:05,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23126 states to 23126 states and 60741 transitions. [2021-07-13 18:22:05,368 INFO L78 Accepts]: Start accepts. Automaton has 23126 states and 60741 transitions. Word has length 259 [2021-07-13 18:22:05,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:05,368 INFO L482 AbstractCegarLoop]: Abstraction has 23126 states and 60741 transitions. [2021-07-13 18:22:05,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:05,369 INFO L276 IsEmpty]: Start isEmpty. Operand 23126 states and 60741 transitions. [2021-07-13 18:22:05,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-07-13 18:22:05,397 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:05,397 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:05,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:05,598 INFO L430 AbstractCegarLoop]: === Iteration 21 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:05,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:05,598 INFO L82 PathProgramCache]: Analyzing trace with hash -155081419, now seen corresponding path program 9 times [2021-07-13 18:22:05,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:05,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193319679] [2021-07-13 18:22:05,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 381 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:22:05,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:05,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193319679] [2021-07-13 18:22:05,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193319679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:05,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589318119] [2021-07-13 18:22:05,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:05,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 18:22:05,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:05,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 18:22:05,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 381 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:22:06,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589318119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:06,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:06,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-07-13 18:22:06,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483692074] [2021-07-13 18:22:06,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 18:22:06,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:06,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 18:22:06,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 18:22:06,315 INFO L87 Difference]: Start difference. First operand 23126 states and 60741 transitions. Second operand has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:06,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:06,774 INFO L93 Difference]: Finished difference Result 34101 states and 89002 transitions. [2021-07-13 18:22:06,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 18:22:06,774 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2021-07-13 18:22:06,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:06,835 INFO L225 Difference]: With dead ends: 34101 [2021-07-13 18:22:06,836 INFO L226 Difference]: Without dead ends: 34101 [2021-07-13 18:22:06,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 152.8ms TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2021-07-13 18:22:06,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34101 states. [2021-07-13 18:22:07,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34101 to 25066. [2021-07-13 18:22:07,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25066 states, 25064 states have (on average 2.6364506862432173) internal successors, (66080), 25065 states have internal predecessors, (66080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:07,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25066 states to 25066 states and 66080 transitions. [2021-07-13 18:22:07,308 INFO L78 Accepts]: Start accepts. Automaton has 25066 states and 66080 transitions. Word has length 259 [2021-07-13 18:22:07,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:07,309 INFO L482 AbstractCegarLoop]: Abstraction has 25066 states and 66080 transitions. [2021-07-13 18:22:07,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:07,309 INFO L276 IsEmpty]: Start isEmpty. Operand 25066 states and 66080 transitions. [2021-07-13 18:22:07,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-07-13 18:22:07,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:07,345 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:07,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-13 18:22:07,547 INFO L430 AbstractCegarLoop]: === Iteration 22 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:07,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:07,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1361856429, now seen corresponding path program 10 times [2021-07-13 18:22:07,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:07,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144408816] [2021-07-13 18:22:07,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:07,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 381 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:22:07,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:07,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144408816] [2021-07-13 18:22:07,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144408816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:07,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801263145] [2021-07-13 18:22:07,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:07,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:22:07,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:07,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 18:22:07,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:08,238 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 381 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:22:08,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801263145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:08,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:08,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-07-13 18:22:08,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208566838] [2021-07-13 18:22:08,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 18:22:08,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:08,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 18:22:08,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 18:22:08,239 INFO L87 Difference]: Start difference. First operand 25066 states and 66080 transitions. Second operand has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:08,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:08,583 INFO L93 Difference]: Finished difference Result 34341 states and 90071 transitions. [2021-07-13 18:22:08,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 18:22:08,583 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2021-07-13 18:22:08,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:08,769 INFO L225 Difference]: With dead ends: 34341 [2021-07-13 18:22:08,769 INFO L226 Difference]: Without dead ends: 34341 [2021-07-13 18:22:08,770 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 165.9ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-07-13 18:22:08,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34341 states. [2021-07-13 18:22:09,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34341 to 26326. [2021-07-13 18:22:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26326 states, 26324 states have (on average 2.641277921288558) internal successors, (69529), 26325 states have internal predecessors, (69529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:09,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26326 states to 26326 states and 69529 transitions. [2021-07-13 18:22:09,275 INFO L78 Accepts]: Start accepts. Automaton has 26326 states and 69529 transitions. Word has length 259 [2021-07-13 18:22:09,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:09,276 INFO L482 AbstractCegarLoop]: Abstraction has 26326 states and 69529 transitions. [2021-07-13 18:22:09,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:09,276 INFO L276 IsEmpty]: Start isEmpty. Operand 26326 states and 69529 transitions. [2021-07-13 18:22:09,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-07-13 18:22:09,316 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:09,316 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, 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 18:22:09,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:09,517 INFO L430 AbstractCegarLoop]: === Iteration 23 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:09,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:09,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1010690922, now seen corresponding path program 4 times [2021-07-13 18:22:09,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:09,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775511283] [2021-07-13 18:22:09,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:09,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:09,637 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 53 proven. 217 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-07-13 18:22:09,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:09,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775511283] [2021-07-13 18:22:09,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775511283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:09,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364943568] [2021-07-13 18:22:09,637 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 18:22:09,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:22:09,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:09,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 18:22:09,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 53 proven. 217 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-07-13 18:22:10,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364943568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:10,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:10,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-13 18:22:10,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83898923] [2021-07-13 18:22:10,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 18:22:10,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:10,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 18:22:10,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 18:22:10,272 INFO L87 Difference]: Start difference. First operand 26326 states and 69529 transitions. Second operand has 13 states, 13 states have (on average 20.615384615384617) internal successors, (268), 13 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:10,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:10,594 INFO L93 Difference]: Finished difference Result 41691 states and 109020 transitions. [2021-07-13 18:22:10,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 18:22:10,594 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 20.615384615384617) internal successors, (268), 13 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 283 [2021-07-13 18:22:10,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:10,809 INFO L225 Difference]: With dead ends: 41691 [2021-07-13 18:22:10,809 INFO L226 Difference]: Without dead ends: 41691 [2021-07-13 18:22:10,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2021-07-13 18:22:10,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41691 states. [2021-07-13 18:22:11,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41691 to 29426. [2021-07-13 18:22:11,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29426 states, 29424 states have (on average 2.6516449157150626) internal successors, (78022), 29425 states have internal predecessors, (78022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:11,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29426 states to 29426 states and 78022 transitions. [2021-07-13 18:22:11,350 INFO L78 Accepts]: Start accepts. Automaton has 29426 states and 78022 transitions. Word has length 283 [2021-07-13 18:22:11,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:11,350 INFO L482 AbstractCegarLoop]: Abstraction has 29426 states and 78022 transitions. [2021-07-13 18:22:11,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 20.615384615384617) internal successors, (268), 13 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:11,351 INFO L276 IsEmpty]: Start isEmpty. Operand 29426 states and 78022 transitions. [2021-07-13 18:22:11,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-07-13 18:22:11,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:11,394 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, 2, 2, 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 18:22:11,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 18:22:11,595 INFO L430 AbstractCegarLoop]: === Iteration 24 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:11,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:11,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1176701279, now seen corresponding path program 5 times [2021-07-13 18:22:11,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:11,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809863403] [2021-07-13 18:22:11,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:11,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 15 proven. 396 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-13 18:22:11,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:11,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809863403] [2021-07-13 18:22:11,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809863403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:11,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005492567] [2021-07-13 18:22:11,731 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 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 18:22:11,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 18:22:11,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:11,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 18:22:11,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 15 proven. 373 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:22:12,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005492567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:12,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:12,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-07-13 18:22:12,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557279569] [2021-07-13 18:22:12,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 18:22:12,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:12,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 18:22:12,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 18:22:12,459 INFO L87 Difference]: Start difference. First operand 29426 states and 78022 transitions. Second operand has 13 states, 13 states have (on average 21.307692307692307) internal successors, (277), 13 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:12,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:12,734 INFO L93 Difference]: Finished difference Result 39436 states and 103060 transitions. [2021-07-13 18:22:12,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 18:22:12,734 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 21.307692307692307) internal successors, (277), 13 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 288 [2021-07-13 18:22:12,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:12,804 INFO L225 Difference]: With dead ends: 39436 [2021-07-13 18:22:12,804 INFO L226 Difference]: Without dead ends: 39436 [2021-07-13 18:22:12,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-07-13 18:22:12,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39436 states. [2021-07-13 18:22:13,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39436 to 27486. [2021-07-13 18:22:13,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27486 states, 27484 states have (on average 2.6445568330665115) internal successors, (72683), 27485 states have internal predecessors, (72683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:13,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27486 states to 27486 states and 72683 transitions. [2021-07-13 18:22:13,448 INFO L78 Accepts]: Start accepts. Automaton has 27486 states and 72683 transitions. Word has length 288 [2021-07-13 18:22:13,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:13,448 INFO L482 AbstractCegarLoop]: Abstraction has 27486 states and 72683 transitions. [2021-07-13 18:22:13,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 21.307692307692307) internal successors, (277), 13 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:13,449 INFO L276 IsEmpty]: Start isEmpty. Operand 27486 states and 72683 transitions. [2021-07-13 18:22:13,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-07-13 18:22:13,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:13,487 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, 2, 2, 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 18:22:13,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-13 18:22:13,688 INFO L430 AbstractCegarLoop]: === Iteration 25 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:13,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:13,688 INFO L82 PathProgramCache]: Analyzing trace with hash 129283205, now seen corresponding path program 6 times [2021-07-13 18:22:13,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:13,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630088049] [2021-07-13 18:22:13,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 54 proven. 388 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-13 18:22:13,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:13,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630088049] [2021-07-13 18:22:13,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630088049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:13,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839113498] [2021-07-13 18:22:13,842 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 18:22:14,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 18:22:14,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:14,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 18:22:14,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 250 proven. 59 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-07-13 18:22:14,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839113498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:14,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:14,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2021-07-13 18:22:14,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242176971] [2021-07-13 18:22:14,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:22:14,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:14,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:22:14,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:22:14,542 INFO L87 Difference]: Start difference. First operand 27486 states and 72683 transitions. Second operand has 22 states, 22 states have (on average 21.136363636363637) internal successors, (465), 22 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:15,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:15,391 INFO L93 Difference]: Finished difference Result 56766 states and 149064 transitions. [2021-07-13 18:22:15,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 18:22:15,391 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 21.136363636363637) internal successors, (465), 22 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 288 [2021-07-13 18:22:15,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:15,541 INFO L225 Difference]: With dead ends: 56766 [2021-07-13 18:22:15,541 INFO L226 Difference]: Without dead ends: 56766 [2021-07-13 18:22:15,542 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 496.9ms TimeCoverageRelationStatistics Valid=623, Invalid=2029, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 18:22:15,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56766 states. [2021-07-13 18:22:16,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56766 to 30626. [2021-07-13 18:22:16,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30626 states, 30624 states have (on average 2.658894984326019) internal successors, (81426), 30625 states have internal predecessors, (81426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:16,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30626 states to 30626 states and 81426 transitions. [2021-07-13 18:22:16,310 INFO L78 Accepts]: Start accepts. Automaton has 30626 states and 81426 transitions. Word has length 288 [2021-07-13 18:22:16,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:16,310 INFO L482 AbstractCegarLoop]: Abstraction has 30626 states and 81426 transitions. [2021-07-13 18:22:16,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 21.136363636363637) internal successors, (465), 22 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:16,311 INFO L276 IsEmpty]: Start isEmpty. Operand 30626 states and 81426 transitions. [2021-07-13 18:22:16,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-07-13 18:22:16,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:16,356 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:16,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:16,557 INFO L430 AbstractCegarLoop]: === Iteration 26 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:16,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:16,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1883498472, now seen corresponding path program 7 times [2021-07-13 18:22:16,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:16,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234897331] [2021-07-13 18:22:16,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:16,719 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:16,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:16,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234897331] [2021-07-13 18:22:16,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234897331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:16,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029027662] [2021-07-13 18:22:16,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:16,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:16,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 18:22:16,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:17,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029027662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:17,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:17,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:22:17,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312553437] [2021-07-13 18:22:17,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:22:17,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:17,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:22:17,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:22:17,496 INFO L87 Difference]: Start difference. First operand 30626 states and 81426 transitions. Second operand has 19 states, 19 states have (on average 17.842105263157894) internal successors, (339), 19 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:17,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:17,920 INFO L93 Difference]: Finished difference Result 39095 states and 103168 transitions. [2021-07-13 18:22:17,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:22:17,920 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 17.842105263157894) internal successors, (339), 19 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 292 [2021-07-13 18:22:17,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:17,994 INFO L225 Difference]: With dead ends: 39095 [2021-07-13 18:22:17,994 INFO L226 Difference]: Without dead ends: 39095 [2021-07-13 18:22:17,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=401, Invalid=789, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 18:22:18,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39095 states. [2021-07-13 18:22:18,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39095 to 33108. [2021-07-13 18:22:18,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33108 states, 33106 states have (on average 2.6558931915664834) internal successors, (87926), 33107 states have internal predecessors, (87926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:18,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33108 states to 33108 states and 87926 transitions. [2021-07-13 18:22:18,738 INFO L78 Accepts]: Start accepts. Automaton has 33108 states and 87926 transitions. Word has length 292 [2021-07-13 18:22:18,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:18,738 INFO L482 AbstractCegarLoop]: Abstraction has 33108 states and 87926 transitions. [2021-07-13 18:22:18,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 17.842105263157894) internal successors, (339), 19 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:18,738 INFO L276 IsEmpty]: Start isEmpty. Operand 33108 states and 87926 transitions. [2021-07-13 18:22:18,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-07-13 18:22:18,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:18,783 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:18,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 18:22:18,983 INFO L430 AbstractCegarLoop]: === Iteration 27 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:18,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:18,984 INFO L82 PathProgramCache]: Analyzing trace with hash 885476248, now seen corresponding path program 11 times [2021-07-13 18:22:18,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:18,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460565557] [2021-07-13 18:22:18,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:19,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 589 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-13 18:22:19,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:19,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460565557] [2021-07-13 18:22:19,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460565557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:19,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084137259] [2021-07-13 18:22:19,142 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 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 18:22:19,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 18:22:19,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:19,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 18:22:19,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:19,573 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:22:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 566 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:22:19,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084137259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:19,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:19,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-13 18:22:19,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737762867] [2021-07-13 18:22:19,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:22:19,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:19,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:22:19,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:22:19,826 INFO L87 Difference]: Start difference. First operand 33108 states and 87926 transitions. Second operand has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:20,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:20,160 INFO L93 Difference]: Finished difference Result 41038 states and 107978 transitions. [2021-07-13 18:22:20,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 18:22:20,161 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 293 [2021-07-13 18:22:20,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:20,345 INFO L225 Difference]: With dead ends: 41038 [2021-07-13 18:22:20,345 INFO L226 Difference]: Without dead ends: 41038 [2021-07-13 18:22:20,345 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 179.2ms TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2021-07-13 18:22:20,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41038 states. [2021-07-13 18:22:20,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41038 to 33108. [2021-07-13 18:22:20,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33108 states, 33106 states have (on average 2.6558931915664834) internal successors, (87926), 33107 states have internal predecessors, (87926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:20,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33108 states to 33108 states and 87926 transitions. [2021-07-13 18:22:20,935 INFO L78 Accepts]: Start accepts. Automaton has 33108 states and 87926 transitions. Word has length 293 [2021-07-13 18:22:20,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:20,935 INFO L482 AbstractCegarLoop]: Abstraction has 33108 states and 87926 transitions. [2021-07-13 18:22:20,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:20,935 INFO L276 IsEmpty]: Start isEmpty. Operand 33108 states and 87926 transitions. [2021-07-13 18:22:20,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-07-13 18:22:20,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:20,979 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:21,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:21,180 INFO L430 AbstractCegarLoop]: === Iteration 28 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:21,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:21,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1494134710, now seen corresponding path program 12 times [2021-07-13 18:22:21,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:21,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272686451] [2021-07-13 18:22:21,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:21,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 566 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:22:21,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:21,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272686451] [2021-07-13 18:22:21,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272686451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:21,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713443529] [2021-07-13 18:22:21,333 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 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 18:22:21,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 18:22:21,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:21,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 18:22:21,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:22,205 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 566 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:22:22,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713443529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:22,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:22,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-13 18:22:22,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884928224] [2021-07-13 18:22:22,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:22:22,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:22,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:22:22,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:22:22,207 INFO L87 Difference]: Start difference. First operand 33108 states and 87926 transitions. Second operand has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:22,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:22,656 INFO L93 Difference]: Finished difference Result 46473 states and 122134 transitions. [2021-07-13 18:22:22,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 18:22:22,656 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 293 [2021-07-13 18:22:22,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:22,741 INFO L225 Difference]: With dead ends: 46473 [2021-07-13 18:22:22,741 INFO L226 Difference]: Without dead ends: 46473 [2021-07-13 18:22:22,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 184.2ms TimeCoverageRelationStatistics Valid=259, Invalid=611, Unknown=0, NotChecked=0, Total=870 [2021-07-13 18:22:22,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46473 states. [2021-07-13 18:22:23,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46473 to 34368. [2021-07-13 18:22:23,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34368 states, 34366 states have (on average 2.6588779607751847) internal successors, (91375), 34367 states have internal predecessors, (91375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:23,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34368 states to 34368 states and 91375 transitions. [2021-07-13 18:22:23,628 INFO L78 Accepts]: Start accepts. Automaton has 34368 states and 91375 transitions. Word has length 293 [2021-07-13 18:22:23,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:23,629 INFO L482 AbstractCegarLoop]: Abstraction has 34368 states and 91375 transitions. [2021-07-13 18:22:23,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:23,629 INFO L276 IsEmpty]: Start isEmpty. Operand 34368 states and 91375 transitions. [2021-07-13 18:22:23,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-07-13 18:22:23,674 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:23,674 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:23,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 18:22:23,875 INFO L430 AbstractCegarLoop]: === Iteration 29 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:23,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:23,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1337820332, now seen corresponding path program 13 times [2021-07-13 18:22:23,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:23,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899267754] [2021-07-13 18:22:23,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:24,138 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 566 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:22:24,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:24,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899267754] [2021-07-13 18:22:24,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899267754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:24,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865230715] [2021-07-13 18:22:24,139 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 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 18:22:24,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:24,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 18:22:24,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:24,700 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 566 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:22:24,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865230715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:24,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:24,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-13 18:22:24,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247316479] [2021-07-13 18:22:24,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:22:24,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:24,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:22:24,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:22:24,702 INFO L87 Difference]: Start difference. First operand 34368 states and 91375 transitions. Second operand has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:25,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:25,192 INFO L93 Difference]: Finished difference Result 46513 states and 122653 transitions. [2021-07-13 18:22:25,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:22:25,193 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 293 [2021-07-13 18:22:25,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:25,275 INFO L225 Difference]: With dead ends: 46513 [2021-07-13 18:22:25,275 INFO L226 Difference]: Without dead ends: 46513 [2021-07-13 18:22:25,275 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 318.2ms TimeCoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2021-07-13 18:22:25,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46513 states. [2021-07-13 18:22:25,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46513 to 36308. [2021-07-13 18:22:26,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36308 states, 36306 states have (on average 2.6638572136836887) internal successors, (96714), 36307 states have internal predecessors, (96714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:26,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36308 states to 36308 states and 96714 transitions. [2021-07-13 18:22:26,099 INFO L78 Accepts]: Start accepts. Automaton has 36308 states and 96714 transitions. Word has length 293 [2021-07-13 18:22:26,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:26,099 INFO L482 AbstractCegarLoop]: Abstraction has 36308 states and 96714 transitions. [2021-07-13 18:22:26,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:26,100 INFO L276 IsEmpty]: Start isEmpty. Operand 36308 states and 96714 transitions. [2021-07-13 18:22:26,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-07-13 18:22:26,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:26,150 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, 2, 2, 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 18:22:26,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 18:22:26,351 INFO L430 AbstractCegarLoop]: === Iteration 30 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:26,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:26,351 INFO L82 PathProgramCache]: Analyzing trace with hash -395080804, now seen corresponding path program 7 times [2021-07-13 18:22:26,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:26,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503065891] [2021-07-13 18:22:26,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:26,508 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 581 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-13 18:22:26,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:26,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503065891] [2021-07-13 18:22:26,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503065891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:26,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506439444] [2021-07-13 18:22:26,508 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 18:22:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:26,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:22:26,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:22:27,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506439444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:27,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:27,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-07-13 18:22:27,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571418781] [2021-07-13 18:22:27,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:22:27,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:27,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:22:27,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:22:27,287 INFO L87 Difference]: Start difference. First operand 36308 states and 96714 transitions. Second operand has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 18:22:27,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:27,770 INFO L93 Difference]: Finished difference Result 55238 states and 146081 transitions. [2021-07-13 18:22:27,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 18:22:27,771 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 322 [2021-07-13 18:22:27,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:27,880 INFO L225 Difference]: With dead ends: 55238 [2021-07-13 18:22:27,880 INFO L226 Difference]: Without dead ends: 55238 [2021-07-13 18:22:27,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2021-07-13 18:22:27,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55238 states. [2021-07-13 18:22:28,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55238 to 36988. [2021-07-13 18:22:28,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36988 states, 36986 states have (on average 2.665981722814038) internal successors, (98604), 36987 states have internal predecessors, (98604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:28,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36988 states to 36988 states and 98604 transitions. [2021-07-13 18:22:28,765 INFO L78 Accepts]: Start accepts. Automaton has 36988 states and 98604 transitions. Word has length 322 [2021-07-13 18:22:28,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:28,765 INFO L482 AbstractCegarLoop]: Abstraction has 36988 states and 98604 transitions. [2021-07-13 18:22:28,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 18:22:28,766 INFO L276 IsEmpty]: Start isEmpty. Operand 36988 states and 98604 transitions. [2021-07-13 18:22:28,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-07-13 18:22:28,816 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:28,816 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, 2, 2, 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 18:22:29,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:29,017 INFO L430 AbstractCegarLoop]: === Iteration 31 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:29,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:29,017 INFO L82 PathProgramCache]: Analyzing trace with hash -752046402, now seen corresponding path program 8 times [2021-07-13 18:22:29,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:29,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564183191] [2021-07-13 18:22:29,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 581 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-13 18:22:29,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:29,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564183191] [2021-07-13 18:22:29,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564183191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:29,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155423390] [2021-07-13 18:22:29,199 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 18:22:29,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:22:29,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:29,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:22:29,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:29,509 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-07-13 18:22:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:22:29,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155423390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:29,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:29,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-07-13 18:22:29,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757058380] [2021-07-13 18:22:29,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:22:29,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:29,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:22:29,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:22:29,957 INFO L87 Difference]: Start difference. First operand 36988 states and 98604 transitions. Second operand has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 18:22:30,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:30,456 INFO L93 Difference]: Finished difference Result 54758 states and 144400 transitions. [2021-07-13 18:22:30,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 18:22:30,456 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 322 [2021-07-13 18:22:30,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:30,564 INFO L225 Difference]: With dead ends: 54758 [2021-07-13 18:22:30,564 INFO L226 Difference]: Without dead ends: 54758 [2021-07-13 18:22:30,564 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 188.3ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-07-13 18:22:30,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54758 states. [2021-07-13 18:22:31,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54758 to 38248. [2021-07-13 18:22:31,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38248 states, 38246 states have (on average 2.6683313287664068) internal successors, (102053), 38247 states have internal predecessors, (102053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:31,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38248 states to 38248 states and 102053 transitions. [2021-07-13 18:22:31,314 INFO L78 Accepts]: Start accepts. Automaton has 38248 states and 102053 transitions. Word has length 322 [2021-07-13 18:22:31,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:31,481 INFO L482 AbstractCegarLoop]: Abstraction has 38248 states and 102053 transitions. [2021-07-13 18:22:31,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 18:22:31,482 INFO L276 IsEmpty]: Start isEmpty. Operand 38248 states and 102053 transitions. [2021-07-13 18:22:31,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-07-13 18:22:31,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:31,555 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, 2, 2, 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 18:22:31,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:31,756 INFO L430 AbstractCegarLoop]: === Iteration 32 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:31,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:31,757 INFO L82 PathProgramCache]: Analyzing trace with hash 447121760, now seen corresponding path program 9 times [2021-07-13 18:22:31,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:31,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574145935] [2021-07-13 18:22:31,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:31,911 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 581 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-13 18:22:31,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:31,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574145935] [2021-07-13 18:22:31,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574145935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:31,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856321082] [2021-07-13 18:22:31,912 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 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 18:22:32,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 18:22:32,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:32,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:22:32,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:32,542 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:22:32,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856321082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:32,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:32,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-07-13 18:22:32,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387454359] [2021-07-13 18:22:32,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:22:32,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:32,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:22:32,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:22:32,544 INFO L87 Difference]: Start difference. First operand 38248 states and 102053 transitions. Second operand has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 18:22:33,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:33,048 INFO L93 Difference]: Finished difference Result 53093 states and 139653 transitions. [2021-07-13 18:22:33,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 18:22:33,049 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 322 [2021-07-13 18:22:33,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:33,160 INFO L225 Difference]: With dead ends: 53093 [2021-07-13 18:22:33,161 INFO L226 Difference]: Without dead ends: 53093 [2021-07-13 18:22:33,161 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 172.7ms TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2021-07-13 18:22:33,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53093 states. [2021-07-13 18:22:33,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53093 to 36308. [2021-07-13 18:22:33,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36308 states, 36306 states have (on average 2.6638572136836887) internal successors, (96714), 36307 states have internal predecessors, (96714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:34,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36308 states to 36308 states and 96714 transitions. [2021-07-13 18:22:34,064 INFO L78 Accepts]: Start accepts. Automaton has 36308 states and 96714 transitions. Word has length 322 [2021-07-13 18:22:34,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:34,065 INFO L482 AbstractCegarLoop]: Abstraction has 36308 states and 96714 transitions. [2021-07-13 18:22:34,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 18:22:34,065 INFO L276 IsEmpty]: Start isEmpty. Operand 36308 states and 96714 transitions. [2021-07-13 18:22:34,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-07-13 18:22:34,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:34,114 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, 2, 2, 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 18:22:34,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-13 18:22:34,337 INFO L430 AbstractCegarLoop]: === Iteration 33 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:34,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:34,338 INFO L82 PathProgramCache]: Analyzing trace with hash 2118752382, now seen corresponding path program 10 times [2021-07-13 18:22:34,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:34,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887379436] [2021-07-13 18:22:34,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:22:34,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:34,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887379436] [2021-07-13 18:22:34,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887379436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:34,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673107775] [2021-07-13 18:22:34,480 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 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 18:22:34,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:22:34,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:34,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:22:34,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:35,107 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:22:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:22:35,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673107775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:35,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:35,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-13 18:22:35,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648730896] [2021-07-13 18:22:35,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:22:35,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:35,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:22:35,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:22:35,338 INFO L87 Difference]: Start difference. First operand 36308 states and 96714 transitions. Second operand has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 18:22:35,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:35,729 INFO L93 Difference]: Finished difference Result 59558 states and 157552 transitions. [2021-07-13 18:22:35,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 18:22:35,729 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 322 [2021-07-13 18:22:35,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:35,988 INFO L225 Difference]: With dead ends: 59558 [2021-07-13 18:22:35,988 INFO L226 Difference]: Without dead ends: 59558 [2021-07-13 18:22:35,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 167.3ms TimeCoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2021-07-13 18:22:36,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59558 states. [2021-07-13 18:22:36,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59558 to 38928. [2021-07-13 18:22:36,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38928 states, 38926 states have (on average 2.670271797770128) internal successors, (103943), 38927 states have internal predecessors, (103943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:36,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38928 states to 38928 states and 103943 transitions. [2021-07-13 18:22:36,849 INFO L78 Accepts]: Start accepts. Automaton has 38928 states and 103943 transitions. Word has length 322 [2021-07-13 18:22:36,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:36,849 INFO L482 AbstractCegarLoop]: Abstraction has 38928 states and 103943 transitions. [2021-07-13 18:22:36,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 18:22:36,849 INFO L276 IsEmpty]: Start isEmpty. Operand 38928 states and 103943 transitions. [2021-07-13 18:22:36,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-07-13 18:22:36,905 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:36,906 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, 2, 2, 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 18:22:37,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:37,106 INFO L430 AbstractCegarLoop]: === Iteration 34 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:37,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:37,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1761786784, now seen corresponding path program 11 times [2021-07-13 18:22:37,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:37,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258631137] [2021-07-13 18:22:37,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:37,450 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:22:37,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:37,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258631137] [2021-07-13 18:22:37,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258631137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:37,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964220882] [2021-07-13 18:22:37,450 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 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 18:22:37,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 18:22:37,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:37,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:22:37,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:22:38,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964220882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:38,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:38,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-13 18:22:38,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894518613] [2021-07-13 18:22:38,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:22:38,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:38,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:22:38,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:22:38,165 INFO L87 Difference]: Start difference. First operand 38928 states and 103943 transitions. Second operand has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 18:22:38,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:38,729 INFO L93 Difference]: Finished difference Result 57013 states and 150357 transitions. [2021-07-13 18:22:38,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 18:22:38,730 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 322 [2021-07-13 18:22:38,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:38,845 INFO L225 Difference]: With dead ends: 57013 [2021-07-13 18:22:38,845 INFO L226 Difference]: Without dead ends: 57013 [2021-07-13 18:22:38,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 363.3ms TimeCoverageRelationStatistics Valid=213, Invalid=599, Unknown=0, NotChecked=0, Total=812 [2021-07-13 18:22:38,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57013 states. [2021-07-13 18:22:39,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57013 to 41348. [2021-07-13 18:22:39,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41348 states, 41346 states have (on average 2.6736806462535676) internal successors, (110546), 41347 states have internal predecessors, (110546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:39,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41348 states to 41348 states and 110546 transitions. [2021-07-13 18:22:39,990 INFO L78 Accepts]: Start accepts. Automaton has 41348 states and 110546 transitions. Word has length 322 [2021-07-13 18:22:39,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:39,990 INFO L482 AbstractCegarLoop]: Abstraction has 41348 states and 110546 transitions. [2021-07-13 18:22:39,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 18:22:39,991 INFO L276 IsEmpty]: Start isEmpty. Operand 41348 states and 110546 transitions. [2021-07-13 18:22:40,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-07-13 18:22:40,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:40,051 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:40,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-13 18:22:40,251 INFO L430 AbstractCegarLoop]: === Iteration 35 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:40,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:40,252 INFO L82 PathProgramCache]: Analyzing trace with hash -350311975, now seen corresponding path program 8 times [2021-07-13 18:22:40,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:40,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339472514] [2021-07-13 18:22:40,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:40,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:40,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339472514] [2021-07-13 18:22:40,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339472514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:40,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495311328] [2021-07-13 18:22:40,440 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 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 18:22:40,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:22:40,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:40,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:22:40,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:41,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:41,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495311328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:41,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:41,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:22:41,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471321937] [2021-07-13 18:22:41,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:22:41,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:41,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:22:41,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:22:41,013 INFO L87 Difference]: Start difference. First operand 41348 states and 110546 transitions. Second operand has 21 states, 21 states have (on average 17.761904761904763) internal successors, (373), 21 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:41,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:41,629 INFO L93 Difference]: Finished difference Result 50527 states and 134028 transitions. [2021-07-13 18:22:41,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:22:41,629 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 17.761904761904763) internal successors, (373), 21 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 326 [2021-07-13 18:22:41,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:41,731 INFO L225 Difference]: With dead ends: 50527 [2021-07-13 18:22:41,732 INFO L226 Difference]: Without dead ends: 50527 [2021-07-13 18:22:41,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 273.2ms TimeCoverageRelationStatistics Valid=496, Invalid=986, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 18:22:41,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50527 states. [2021-07-13 18:22:42,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50527 to 43150. [2021-07-13 18:22:42,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43150 states, 43148 states have (on average 2.668860665616019) internal successors, (115156), 43149 states have internal predecessors, (115156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:42,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43150 states to 43150 states and 115156 transitions. [2021-07-13 18:22:42,768 INFO L78 Accepts]: Start accepts. Automaton has 43150 states and 115156 transitions. Word has length 326 [2021-07-13 18:22:42,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:42,768 INFO L482 AbstractCegarLoop]: Abstraction has 43150 states and 115156 transitions. [2021-07-13 18:22:42,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 17.761904761904763) internal successors, (373), 21 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:42,768 INFO L276 IsEmpty]: Start isEmpty. Operand 43150 states and 115156 transitions. [2021-07-13 18:22:42,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-07-13 18:22:42,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:42,838 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:43,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 18:22:43,040 INFO L430 AbstractCegarLoop]: === Iteration 36 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:43,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:43,040 INFO L82 PathProgramCache]: Analyzing trace with hash 670891353, now seen corresponding path program 14 times [2021-07-13 18:22:43,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:43,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460157363] [2021-07-13 18:22:43,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 808 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-13 18:22:43,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:43,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460157363] [2021-07-13 18:22:43,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460157363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:43,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101651650] [2021-07-13 18:22:43,258 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 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 18:22:43,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:22:43,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:43,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:22:43,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:22:43,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101651650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:43,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:43,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-13 18:22:43,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730171351] [2021-07-13 18:22:43,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:22:43,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:43,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:22:43,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:22:43,938 INFO L87 Difference]: Start difference. First operand 43150 states and 115156 transitions. Second operand has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:44,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:44,369 INFO L93 Difference]: Finished difference Result 53420 states and 141238 transitions. [2021-07-13 18:22:44,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:22:44,369 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 327 [2021-07-13 18:22:44,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:44,479 INFO L225 Difference]: With dead ends: 53420 [2021-07-13 18:22:44,480 INFO L226 Difference]: Without dead ends: 53420 [2021-07-13 18:22:44,480 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 227.7ms TimeCoverageRelationStatistics Valid=338, Invalid=784, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 18:22:44,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53420 states. [2021-07-13 18:22:45,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53420 to 43830. [2021-07-13 18:22:45,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43830 states, 43828 states have (on average 2.6705758875604637) internal successors, (117046), 43829 states have internal predecessors, (117046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:45,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43830 states to 43830 states and 117046 transitions. [2021-07-13 18:22:45,491 INFO L78 Accepts]: Start accepts. Automaton has 43830 states and 117046 transitions. Word has length 327 [2021-07-13 18:22:45,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:45,491 INFO L482 AbstractCegarLoop]: Abstraction has 43830 states and 117046 transitions. [2021-07-13 18:22:45,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:45,491 INFO L276 IsEmpty]: Start isEmpty. Operand 43830 states and 117046 transitions. [2021-07-13 18:22:45,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-07-13 18:22:45,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:45,553 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:45,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 18:22:45,754 INFO L430 AbstractCegarLoop]: === Iteration 37 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:45,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:45,754 INFO L82 PathProgramCache]: Analyzing trace with hash 852613623, now seen corresponding path program 15 times [2021-07-13 18:22:45,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:45,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619106151] [2021-07-13 18:22:45,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:45,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:45,929 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:22:45,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:45,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619106151] [2021-07-13 18:22:45,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619106151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:45,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978922317] [2021-07-13 18:22:45,929 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 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 18:22:46,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 18:22:46,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:46,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:22:46,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:22:46,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978922317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:46,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:46,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:22:46,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852751459] [2021-07-13 18:22:46,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:22:46,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:46,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:22:46,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:22:46,853 INFO L87 Difference]: Start difference. First operand 43830 states and 117046 transitions. Second operand has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:47,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:47,484 INFO L93 Difference]: Finished difference Result 57625 states and 151795 transitions. [2021-07-13 18:22:47,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:22:47,485 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 327 [2021-07-13 18:22:47,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:47,594 INFO L225 Difference]: With dead ends: 57625 [2021-07-13 18:22:47,595 INFO L226 Difference]: Without dead ends: 57625 [2021-07-13 18:22:47,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=336, Invalid=786, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 18:22:47,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57625 states. [2021-07-13 18:22:48,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57625 to 43150. [2021-07-13 18:22:48,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43150 states, 43148 states have (on average 2.668860665616019) internal successors, (115156), 43149 states have internal predecessors, (115156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:48,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43150 states to 43150 states and 115156 transitions. [2021-07-13 18:22:48,468 INFO L78 Accepts]: Start accepts. Automaton has 43150 states and 115156 transitions. Word has length 327 [2021-07-13 18:22:48,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:48,468 INFO L482 AbstractCegarLoop]: Abstraction has 43150 states and 115156 transitions. [2021-07-13 18:22:48,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:48,468 INFO L276 IsEmpty]: Start isEmpty. Operand 43150 states and 115156 transitions. [2021-07-13 18:22:48,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-07-13 18:22:48,537 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:48,537 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:48,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 18:22:48,738 INFO L430 AbstractCegarLoop]: === Iteration 38 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:48,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:48,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1461272085, now seen corresponding path program 16 times [2021-07-13 18:22:48,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:48,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728442580] [2021-07-13 18:22:48,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:49,167 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:22:49,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:49,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728442580] [2021-07-13 18:22:49,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728442580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:49,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542815696] [2021-07-13 18:22:49,168 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 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 18:22:49,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:22:49,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:49,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:22:49,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:49,836 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:22:49,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542815696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:49,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:49,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:22:49,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990420611] [2021-07-13 18:22:49,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:22:49,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:49,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:22:49,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:22:49,838 INFO L87 Difference]: Start difference. First operand 43150 states and 115156 transitions. Second operand has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:50,331 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-07-13 18:22:50,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:50,456 INFO L93 Difference]: Finished difference Result 58745 states and 155304 transitions. [2021-07-13 18:22:50,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:22:50,460 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 327 [2021-07-13 18:22:50,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:50,596 INFO L225 Difference]: With dead ends: 58745 [2021-07-13 18:22:50,596 INFO L226 Difference]: Without dead ends: 58745 [2021-07-13 18:22:50,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 392.2ms TimeCoverageRelationStatistics Valid=345, Invalid=845, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 18:22:50,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58745 states. [2021-07-13 18:22:51,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58745 to 45090. [2021-07-13 18:22:51,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45090 states, 45088 states have (on average 2.672440560681334) internal successors, (120495), 45089 states have internal predecessors, (120495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:51,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45090 states to 45090 states and 120495 transitions. [2021-07-13 18:22:51,572 INFO L78 Accepts]: Start accepts. Automaton has 45090 states and 120495 transitions. Word has length 327 [2021-07-13 18:22:51,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:51,572 INFO L482 AbstractCegarLoop]: Abstraction has 45090 states and 120495 transitions. [2021-07-13 18:22:51,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:51,573 INFO L276 IsEmpty]: Start isEmpty. Operand 45090 states and 120495 transitions. [2021-07-13 18:22:51,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-07-13 18:22:51,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:51,879 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:52,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 18:22:52,079 INFO L430 AbstractCegarLoop]: === Iteration 39 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:52,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:52,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1370682957, now seen corresponding path program 17 times [2021-07-13 18:22:52,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:52,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308184649] [2021-07-13 18:22:52,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:52,243 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:22:52,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:52,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308184649] [2021-07-13 18:22:52,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308184649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:52,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161280280] [2021-07-13 18:22:52,244 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 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 18:22:52,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 18:22:52,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:52,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:22:52,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:22:52,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161280280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:52,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:52,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:22:52,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545398697] [2021-07-13 18:22:52,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:22:52,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:52,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:22:52,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:22:52,964 INFO L87 Difference]: Start difference. First operand 45090 states and 120495 transitions. Second operand has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:53,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:53,684 INFO L93 Difference]: Finished difference Result 64210 states and 169402 transitions. [2021-07-13 18:22:53,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:22:53,684 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 327 [2021-07-13 18:22:53,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:53,827 INFO L225 Difference]: With dead ends: 64210 [2021-07-13 18:22:53,827 INFO L226 Difference]: Without dead ends: 64210 [2021-07-13 18:22:53,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 240.9ms TimeCoverageRelationStatistics Valid=354, Invalid=906, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:22:53,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64210 states. [2021-07-13 18:22:54,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64210 to 48290. [2021-07-13 18:22:54,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48290 states, 48288 states have (on average 2.6773318422796555) internal successors, (129283), 48289 states have internal predecessors, (129283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:55,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48290 states to 48290 states and 129283 transitions. [2021-07-13 18:22:55,105 INFO L78 Accepts]: Start accepts. Automaton has 48290 states and 129283 transitions. Word has length 327 [2021-07-13 18:22:55,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:55,106 INFO L482 AbstractCegarLoop]: Abstraction has 48290 states and 129283 transitions. [2021-07-13 18:22:55,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:55,106 INFO L276 IsEmpty]: Start isEmpty. Operand 48290 states and 129283 transitions. [2021-07-13 18:22:55,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-07-13 18:22:55,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:55,173 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:55,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 18:22:55,374 INFO L430 AbstractCegarLoop]: === Iteration 40 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:55,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:55,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1717509329, now seen corresponding path program 18 times [2021-07-13 18:22:55,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:55,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895612691] [2021-07-13 18:22:55,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:22:55,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:55,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895612691] [2021-07-13 18:22:55,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895612691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:55,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283470551] [2021-07-13 18:22:55,539 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 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 18:22:55,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 18:22:55,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:55,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:22:55,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:22:56,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283470551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:56,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:56,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:22:56,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715863002] [2021-07-13 18:22:56,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:22:56,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:56,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:22:56,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:22:56,481 INFO L87 Difference]: Start difference. First operand 48290 states and 129283 transitions. Second operand has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:57,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:57,008 INFO L93 Difference]: Finished difference Result 71055 states and 187712 transitions. [2021-07-13 18:22:57,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 18:22:57,009 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 327 [2021-07-13 18:22:57,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:57,357 INFO L225 Difference]: With dead ends: 71055 [2021-07-13 18:22:57,357 INFO L226 Difference]: Without dead ends: 71055 [2021-07-13 18:22:57,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 230.0ms TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:22:57,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71055 states. [2021-07-13 18:22:58,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71055 to 49550. [2021-07-13 18:22:58,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49550 states, 49548 states have (on average 2.678856866069266) internal successors, (132732), 49549 states have internal predecessors, (132732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:58,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49550 states to 49550 states and 132732 transitions. [2021-07-13 18:22:58,468 INFO L78 Accepts]: Start accepts. Automaton has 49550 states and 132732 transitions. Word has length 327 [2021-07-13 18:22:58,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:58,469 INFO L482 AbstractCegarLoop]: Abstraction has 49550 states and 132732 transitions. [2021-07-13 18:22:58,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:58,469 INFO L276 IsEmpty]: Start isEmpty. Operand 49550 states and 132732 transitions. [2021-07-13 18:22:58,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-07-13 18:22:58,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:58,541 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:58,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 18:22:58,742 INFO L430 AbstractCegarLoop]: === Iteration 41 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:58,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:58,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1605982063, now seen corresponding path program 19 times [2021-07-13 18:22:58,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:58,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596911467] [2021-07-13 18:22:58,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:59,146 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:22:59,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:59,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596911467] [2021-07-13 18:22:59,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596911467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:59,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121884355] [2021-07-13 18:22:59,147 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 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 18:22:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:59,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:22:59,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:22:59,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121884355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:59,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:59,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:22:59,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146973880] [2021-07-13 18:22:59,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:22:59,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:59,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:22:59,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:22:59,721 INFO L87 Difference]: Start difference. First operand 49550 states and 132732 transitions. Second operand has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:00,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:00,400 INFO L93 Difference]: Finished difference Result 66465 states and 176301 transitions. [2021-07-13 18:23:00,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:23:00,401 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 327 [2021-07-13 18:23:00,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:00,543 INFO L225 Difference]: With dead ends: 66465 [2021-07-13 18:23:00,543 INFO L226 Difference]: Without dead ends: 66465 [2021-07-13 18:23:00,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 244.9ms TimeCoverageRelationStatistics Valid=372, Invalid=1034, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 18:23:00,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66465 states. [2021-07-13 18:23:01,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66465 to 48190. [2021-07-13 18:23:01,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48190 states, 48188 states have (on average 2.6760189258736613) internal successors, (128952), 48189 states have internal predecessors, (128952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:01,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48190 states to 48190 states and 128952 transitions. [2021-07-13 18:23:01,847 INFO L78 Accepts]: Start accepts. Automaton has 48190 states and 128952 transitions. Word has length 327 [2021-07-13 18:23:01,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:01,847 INFO L482 AbstractCegarLoop]: Abstraction has 48190 states and 128952 transitions. [2021-07-13 18:23:01,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:01,847 INFO L276 IsEmpty]: Start isEmpty. Operand 48190 states and 128952 transitions. [2021-07-13 18:23:01,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-07-13 18:23:01,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:01,926 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, 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 18:23:02,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:02,126 INFO L430 AbstractCegarLoop]: === Iteration 42 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:02,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:02,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1871299756, now seen corresponding path program 12 times [2021-07-13 18:23:02,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:02,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395006091] [2021-07-13 18:23:02,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 18 proven. 602 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-13 18:23:02,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:02,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395006091] [2021-07-13 18:23:02,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395006091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:02,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227700141] [2021-07-13 18:23:02,278 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 18:23:02,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 18:23:02,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:02,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:02,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:02,932 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 18 proven. 579 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:23:02,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227700141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:02,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:02,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-07-13 18:23:02,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967139475] [2021-07-13 18:23:02,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 18:23:02,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:02,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 18:23:02,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 18:23:02,933 INFO L87 Difference]: Start difference. First operand 48190 states and 128952 transitions. Second operand has 14 states, 14 states have (on average 21.857142857142858) internal successors, (306), 14 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 18:23:03,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:03,617 INFO L93 Difference]: Finished difference Result 84430 states and 223303 transitions. [2021-07-13 18:23:03,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 18:23:03,617 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 21.857142857142858) internal successors, (306), 14 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 351 [2021-07-13 18:23:03,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:03,790 INFO L225 Difference]: With dead ends: 84430 [2021-07-13 18:23:03,790 INFO L226 Difference]: Without dead ends: 84430 [2021-07-13 18:23:03,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 157.1ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-07-13 18:23:03,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84430 states. [2021-07-13 18:23:05,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84430 to 57010. [2021-07-13 18:23:05,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57010 states, 57008 states have (on average 2.6867632612966603) internal successors, (153167), 57009 states have internal predecessors, (153167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:05,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57010 states to 57010 states and 153167 transitions. [2021-07-13 18:23:05,251 INFO L78 Accepts]: Start accepts. Automaton has 57010 states and 153167 transitions. Word has length 351 [2021-07-13 18:23:05,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:05,252 INFO L482 AbstractCegarLoop]: Abstraction has 57010 states and 153167 transitions. [2021-07-13 18:23:05,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 21.857142857142858) internal successors, (306), 14 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 18:23:05,252 INFO L276 IsEmpty]: Start isEmpty. Operand 57010 states and 153167 transitions. [2021-07-13 18:23:05,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-13 18:23:05,640 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:05,641 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, 2, 2, 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 18:23:05,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:05,842 INFO L430 AbstractCegarLoop]: === Iteration 43 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:05,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:05,842 INFO L82 PathProgramCache]: Analyzing trace with hash -784131781, now seen corresponding path program 13 times [2021-07-13 18:23:05,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:05,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193755410] [2021-07-13 18:23:05,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-13 18:23:06,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:06,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193755410] [2021-07-13 18:23:06,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193755410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:06,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400312383] [2021-07-13 18:23:06,016 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 18:23:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:06,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:06,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:23:06,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400312383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:06,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:06,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-13 18:23:06,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066932083] [2021-07-13 18:23:06,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:23:06,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:06,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:23:06,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:23:06,534 INFO L87 Difference]: Start difference. First operand 57010 states and 153167 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:07,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:07,272 INFO L93 Difference]: Finished difference Result 84875 states and 226287 transitions. [2021-07-13 18:23:07,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:23:07,273 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-07-13 18:23:07,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:07,472 INFO L225 Difference]: With dead ends: 84875 [2021-07-13 18:23:07,472 INFO L226 Difference]: Without dead ends: 84875 [2021-07-13 18:23:07,472 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 392.5ms TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 18:23:07,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84875 states. [2021-07-13 18:23:09,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84875 to 58370. [2021-07-13 18:23:09,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58370 states, 58368 states have (on average 2.6889220120614037) internal successors, (156947), 58369 states have internal predecessors, (156947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:09,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58370 states to 58370 states and 156947 transitions. [2021-07-13 18:23:09,450 INFO L78 Accepts]: Start accepts. Automaton has 58370 states and 156947 transitions. Word has length 356 [2021-07-13 18:23:09,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:09,452 INFO L482 AbstractCegarLoop]: Abstraction has 58370 states and 156947 transitions. [2021-07-13 18:23:09,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:09,452 INFO L276 IsEmpty]: Start isEmpty. Operand 58370 states and 156947 transitions. [2021-07-13 18:23:09,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-13 18:23:09,605 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:09,605 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, 2, 2, 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 18:23:09,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:09,830 INFO L430 AbstractCegarLoop]: === Iteration 44 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:09,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:09,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1141097379, now seen corresponding path program 14 times [2021-07-13 18:23:09,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:09,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228267922] [2021-07-13 18:23:09,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-13 18:23:10,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:10,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228267922] [2021-07-13 18:23:10,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228267922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:10,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140115117] [2021-07-13 18:23:10,011 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 18:23:10,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:23:10,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:10,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:10,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:10,608 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:23:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:23:10,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140115117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:10,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:10,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-13 18:23:10,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66991455] [2021-07-13 18:23:10,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:23:10,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:10,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:23:10,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:23:10,802 INFO L87 Difference]: Start difference. First operand 58370 states and 156947 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:11,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:11,375 INFO L93 Difference]: Finished difference Result 84600 states and 225611 transitions. [2021-07-13 18:23:11,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:23:11,375 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-07-13 18:23:11,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:11,775 INFO L225 Difference]: With dead ends: 84600 [2021-07-13 18:23:11,775 INFO L226 Difference]: Without dead ends: 84600 [2021-07-13 18:23:11,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 202.5ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 18:23:11,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84600 states. [2021-07-13 18:23:12,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84600 to 58370. [2021-07-13 18:23:12,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58370 states, 58368 states have (on average 2.6889220120614037) internal successors, (156947), 58369 states have internal predecessors, (156947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:13,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58370 states to 58370 states and 156947 transitions. [2021-07-13 18:23:13,347 INFO L78 Accepts]: Start accepts. Automaton has 58370 states and 156947 transitions. Word has length 356 [2021-07-13 18:23:13,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:13,347 INFO L482 AbstractCegarLoop]: Abstraction has 58370 states and 156947 transitions. [2021-07-13 18:23:13,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:13,347 INFO L276 IsEmpty]: Start isEmpty. Operand 58370 states and 156947 transitions. [2021-07-13 18:23:13,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-13 18:23:13,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:13,440 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, 2, 2, 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 18:23:13,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-13 18:23:13,640 INFO L430 AbstractCegarLoop]: === Iteration 45 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:13,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:13,641 INFO L82 PathProgramCache]: Analyzing trace with hash 58070783, now seen corresponding path program 15 times [2021-07-13 18:23:13,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:13,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152471967] [2021-07-13 18:23:13,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:13,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-13 18:23:13,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:13,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152471967] [2021-07-13 18:23:13,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152471967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:13,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686171484] [2021-07-13 18:23:13,809 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 18:23:14,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 18:23:14,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:14,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:14,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:14,572 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:23:14,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686171484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:14,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:14,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-13 18:23:14,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724875103] [2021-07-13 18:23:14,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:23:14,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:14,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:23:14,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:23:14,573 INFO L87 Difference]: Start difference. First operand 58370 states and 156947 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:15,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:15,341 INFO L93 Difference]: Finished difference Result 86910 states and 231422 transitions. [2021-07-13 18:23:15,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 18:23:15,342 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-07-13 18:23:15,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:15,520 INFO L225 Difference]: With dead ends: 86910 [2021-07-13 18:23:15,521 INFO L226 Difference]: Without dead ends: 86910 [2021-07-13 18:23:15,521 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 199.7ms TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 18:23:15,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86910 states. [2021-07-13 18:23:16,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86910 to 59630. [2021-07-13 18:23:16,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59630 states, 59628 states have (on average 2.6899443214597167) internal successors, (160396), 59629 states have internal predecessors, (160396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:17,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59630 states to 59630 states and 160396 transitions. [2021-07-13 18:23:17,383 INFO L78 Accepts]: Start accepts. Automaton has 59630 states and 160396 transitions. Word has length 356 [2021-07-13 18:23:17,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:17,383 INFO L482 AbstractCegarLoop]: Abstraction has 59630 states and 160396 transitions. [2021-07-13 18:23:17,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:17,383 INFO L276 IsEmpty]: Start isEmpty. Operand 59630 states and 160396 transitions. [2021-07-13 18:23:17,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-13 18:23:17,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:17,534 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, 2, 2, 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 18:23:17,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:17,734 INFO L430 AbstractCegarLoop]: === Iteration 46 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:17,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:17,735 INFO L82 PathProgramCache]: Analyzing trace with hash -719140575, now seen corresponding path program 16 times [2021-07-13 18:23:17,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:17,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747221626] [2021-07-13 18:23:17,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-13 18:23:17,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:17,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747221626] [2021-07-13 18:23:17,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747221626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:17,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269476029] [2021-07-13 18:23:17,902 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 18:23:18,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:23:18,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:18,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:18,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:23:18,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269476029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:18,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:18,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-13 18:23:18,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93496750] [2021-07-13 18:23:18,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:23:18,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:18,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:23:18,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:23:18,639 INFO L87 Difference]: Start difference. First operand 59630 states and 160396 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:19,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:19,433 INFO L93 Difference]: Finished difference Result 78235 states and 207498 transitions. [2021-07-13 18:23:19,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 18:23:19,434 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-07-13 18:23:19,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:19,604 INFO L225 Difference]: With dead ends: 78235 [2021-07-13 18:23:19,604 INFO L226 Difference]: Without dead ends: 78235 [2021-07-13 18:23:19,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 222.0ms TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 18:23:19,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78235 states. [2021-07-13 18:23:20,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78235 to 57690. [2021-07-13 18:23:20,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57690 states, 57688 states have (on average 2.68785535986687) internal successors, (155057), 57689 states have internal predecessors, (155057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:21,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57690 states to 57690 states and 155057 transitions. [2021-07-13 18:23:21,054 INFO L78 Accepts]: Start accepts. Automaton has 57690 states and 155057 transitions. Word has length 356 [2021-07-13 18:23:21,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:21,055 INFO L482 AbstractCegarLoop]: Abstraction has 57690 states and 155057 transitions. [2021-07-13 18:23:21,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:21,055 INFO L276 IsEmpty]: Start isEmpty. Operand 57690 states and 155057 transitions. [2021-07-13 18:23:21,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-13 18:23:21,155 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:21,156 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, 2, 2, 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 18:23:21,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:21,356 INFO L430 AbstractCegarLoop]: === Iteration 47 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:21,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:21,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1710189981, now seen corresponding path program 17 times [2021-07-13 18:23:21,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:21,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934435255] [2021-07-13 18:23:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:21,507 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:23:21,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:21,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934435255] [2021-07-13 18:23:21,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934435255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:21,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231116893] [2021-07-13 18:23:21,508 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 18:23:22,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 18:23:22,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:22,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:22,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:22,574 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:23:22,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231116893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:22,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:22,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 18:23:22,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213236903] [2021-07-13 18:23:22,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:23:22,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:22,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:23:22,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:23:22,576 INFO L87 Difference]: Start difference. First operand 57690 states and 155057 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:23,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:23,425 INFO L93 Difference]: Finished difference Result 94765 states and 252835 transitions. [2021-07-13 18:23:23,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:23:23,426 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-07-13 18:23:23,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:23,629 INFO L225 Difference]: With dead ends: 94765 [2021-07-13 18:23:23,629 INFO L226 Difference]: Without dead ends: 94765 [2021-07-13 18:23:23,630 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 210.4ms TimeCoverageRelationStatistics Valid=288, Invalid=834, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 18:23:23,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94765 states. [2021-07-13 18:23:25,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94765 to 60990. [2021-07-13 18:23:25,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60990 states, 60988 states have (on average 2.691939397914344) internal successors, (164176), 60989 states have internal predecessors, (164176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:25,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60990 states to 60990 states and 164176 transitions. [2021-07-13 18:23:25,273 INFO L78 Accepts]: Start accepts. Automaton has 60990 states and 164176 transitions. Word has length 356 [2021-07-13 18:23:25,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:25,273 INFO L482 AbstractCegarLoop]: Abstraction has 60990 states and 164176 transitions. [2021-07-13 18:23:25,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:25,273 INFO L276 IsEmpty]: Start isEmpty. Operand 60990 states and 164176 transitions. [2021-07-13 18:23:25,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-13 18:23:25,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:25,657 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, 2, 2, 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 18:23:25,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-13 18:23:25,858 INFO L430 AbstractCegarLoop]: === Iteration 48 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:25,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:25,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1353224383, now seen corresponding path program 18 times [2021-07-13 18:23:25,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:25,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064479950] [2021-07-13 18:23:25,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:23:26,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:26,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064479950] [2021-07-13 18:23:26,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064479950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:26,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94381759] [2021-07-13 18:23:26,005 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 18:23:26,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 18:23:26,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:26,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:26,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:23:26,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94381759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:26,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:26,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 18:23:26,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213035233] [2021-07-13 18:23:26,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:23:26,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:26,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:23:26,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:23:26,685 INFO L87 Difference]: Start difference. First operand 60990 states and 164176 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:27,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:27,441 INFO L93 Difference]: Finished difference Result 94500 states and 252439 transitions. [2021-07-13 18:23:27,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 18:23:27,441 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-07-13 18:23:27,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:27,637 INFO L225 Difference]: With dead ends: 94500 [2021-07-13 18:23:27,637 INFO L226 Difference]: Without dead ends: 94500 [2021-07-13 18:23:27,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 192.1ms TimeCoverageRelationStatistics Valid=280, Invalid=776, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 18:23:27,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94500 states. [2021-07-13 18:23:29,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94500 to 61570. [2021-07-13 18:23:29,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61570 states, 61568 states have (on average 2.691901637214137) internal successors, (165735), 61569 states have internal predecessors, (165735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:29,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61570 states to 61570 states and 165735 transitions. [2021-07-13 18:23:29,244 INFO L78 Accepts]: Start accepts. Automaton has 61570 states and 165735 transitions. Word has length 356 [2021-07-13 18:23:29,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:29,245 INFO L482 AbstractCegarLoop]: Abstraction has 61570 states and 165735 transitions. [2021-07-13 18:23:29,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:29,245 INFO L276 IsEmpty]: Start isEmpty. Operand 61570 states and 165735 transitions. [2021-07-13 18:23:29,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-13 18:23:29,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:29,347 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, 2, 2, 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 18:23:29,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 18:23:29,548 INFO L430 AbstractCegarLoop]: === Iteration 49 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:29,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:29,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1742574751, now seen corresponding path program 19 times [2021-07-13 18:23:29,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:29,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976705768] [2021-07-13 18:23:29,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:30,122 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:23:30,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:30,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976705768] [2021-07-13 18:23:30,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976705768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:30,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295349693] [2021-07-13 18:23:30,123 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 18:23:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:30,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:30,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:23:30,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295349693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:30,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:30,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 18:23:30,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426901344] [2021-07-13 18:23:30,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:23:30,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:30,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:23:30,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:23:30,654 INFO L87 Difference]: Start difference. First operand 61570 states and 165735 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:31,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:31,376 INFO L93 Difference]: Finished difference Result 85000 states and 225917 transitions. [2021-07-13 18:23:31,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 18:23:31,376 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-07-13 18:23:31,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:31,559 INFO L225 Difference]: With dead ends: 85000 [2021-07-13 18:23:31,559 INFO L226 Difference]: Without dead ends: 85000 [2021-07-13 18:23:31,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 219.9ms TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 18:23:31,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85000 states. [2021-07-13 18:23:32,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85000 to 60110. [2021-07-13 18:23:32,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60110 states, 60108 states have (on average 2.6894922472882143) internal successors, (161660), 60109 states have internal predecessors, (161660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:33,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60110 states to 60110 states and 161660 transitions. [2021-07-13 18:23:33,037 INFO L78 Accepts]: Start accepts. Automaton has 60110 states and 161660 transitions. Word has length 356 [2021-07-13 18:23:33,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:33,037 INFO L482 AbstractCegarLoop]: Abstraction has 60110 states and 161660 transitions. [2021-07-13 18:23:33,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:33,037 INFO L276 IsEmpty]: Start isEmpty. Operand 60110 states and 161660 transitions. [2021-07-13 18:23:33,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-13 18:23:33,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:33,150 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, 2, 2, 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 18:23:33,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 18:23:33,356 INFO L430 AbstractCegarLoop]: === Iteration 50 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:33,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:33,356 INFO L82 PathProgramCache]: Analyzing trace with hash -70944129, now seen corresponding path program 20 times [2021-07-13 18:23:33,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:33,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087893961] [2021-07-13 18:23:33,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:23:33,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:33,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087893961] [2021-07-13 18:23:33,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087893961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:33,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345983037] [2021-07-13 18:23:33,535 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 18:23:34,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:23:34,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:34,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:34,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:23:34,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345983037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:34,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:34,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 18:23:34,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839673737] [2021-07-13 18:23:34,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:23:34,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:34,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:23:34,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:23:34,405 INFO L87 Difference]: Start difference. First operand 60110 states and 161660 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:35,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:35,252 INFO L93 Difference]: Finished difference Result 102765 states and 275164 transitions. [2021-07-13 18:23:35,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:23:35,253 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-07-13 18:23:35,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:35,507 INFO L225 Difference]: With dead ends: 102765 [2021-07-13 18:23:35,507 INFO L226 Difference]: Without dead ends: 102765 [2021-07-13 18:23:35,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 230.8ms TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 18:23:35,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102765 states. [2021-07-13 18:23:37,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102765 to 62050. [2021-07-13 18:23:37,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62050 states, 62048 states have (on average 2.6914485559566788) internal successors, (166999), 62049 states have internal predecessors, (166999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:37,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62050 states to 62050 states and 166999 transitions. [2021-07-13 18:23:37,250 INFO L78 Accepts]: Start accepts. Automaton has 62050 states and 166999 transitions. Word has length 356 [2021-07-13 18:23:37,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:37,250 INFO L482 AbstractCegarLoop]: Abstraction has 62050 states and 166999 transitions. [2021-07-13 18:23:37,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:37,250 INFO L276 IsEmpty]: Start isEmpty. Operand 62050 states and 166999 transitions. [2021-07-13 18:23:37,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-13 18:23:37,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:37,691 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, 2, 2, 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 18:23:37,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:37,916 INFO L430 AbstractCegarLoop]: === Iteration 51 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:37,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:37,916 INFO L82 PathProgramCache]: Analyzing trace with hash -427909727, now seen corresponding path program 21 times [2021-07-13 18:23:37,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:37,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59713250] [2021-07-13 18:23:37,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:23:38,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:38,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59713250] [2021-07-13 18:23:38,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59713250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:38,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609387538] [2021-07-13 18:23:38,077 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 18:23:38,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 18:23:38,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:38,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:38,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:23:38,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609387538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:38,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:38,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 18:23:38,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914355106] [2021-07-13 18:23:38,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:23:38,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:38,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:23:38,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:23:38,760 INFO L87 Difference]: Start difference. First operand 62050 states and 166999 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:39,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:39,491 INFO L93 Difference]: Finished difference Result 84020 states and 223960 transitions. [2021-07-13 18:23:39,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:23:39,492 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-07-13 18:23:39,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:39,667 INFO L225 Difference]: With dead ends: 84020 [2021-07-13 18:23:39,667 INFO L226 Difference]: Without dead ends: 84020 [2021-07-13 18:23:39,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 209.2ms TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 18:23:39,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84020 states. [2021-07-13 18:23:41,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84020 to 64470. [2021-07-13 18:23:41,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64470 states, 64468 states have (on average 2.692839858534467) internal successors, (173602), 64469 states have internal predecessors, (173602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:41,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64470 states to 64470 states and 173602 transitions. [2021-07-13 18:23:41,254 INFO L78 Accepts]: Start accepts. Automaton has 64470 states and 173602 transitions. Word has length 356 [2021-07-13 18:23:41,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:41,254 INFO L482 AbstractCegarLoop]: Abstraction has 64470 states and 173602 transitions. [2021-07-13 18:23:41,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:41,255 INFO L276 IsEmpty]: Start isEmpty. Operand 64470 states and 173602 transitions. [2021-07-13 18:23:41,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2021-07-13 18:23:41,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:41,369 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:23:41,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:41,570 INFO L430 AbstractCegarLoop]: === Iteration 52 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:41,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:41,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1006996314, now seen corresponding path program 9 times [2021-07-13 18:23:41,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:41,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905632024] [2021-07-13 18:23:41,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:23:42,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:42,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905632024] [2021-07-13 18:23:42,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905632024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:42,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877774790] [2021-07-13 18:23:42,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:42,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 18:23:42,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:42,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:42,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:23:42,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877774790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:42,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:42,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-07-13 18:23:42,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244299802] [2021-07-13 18:23:42,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 18:23:42,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:42,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 18:23:42,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-07-13 18:23:42,943 INFO L87 Difference]: Start difference. First operand 64470 states and 173602 transitions. Second operand has 23 states, 23 states have (on average 17.695652173913043) internal successors, (407), 23 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:43,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:43,797 INFO L93 Difference]: Finished difference Result 74359 states and 198824 transitions. [2021-07-13 18:23:43,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 18:23:43,798 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 17.695652173913043) internal successors, (407), 23 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 360 [2021-07-13 18:23:43,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:43,964 INFO L225 Difference]: With dead ends: 74359 [2021-07-13 18:23:43,964 INFO L226 Difference]: Without dead ends: 74359 [2021-07-13 18:23:43,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 377.9ms TimeCoverageRelationStatistics Valid=601, Invalid=1205, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 18:23:44,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74359 states. [2021-07-13 18:23:45,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74359 to 66272. [2021-07-13 18:23:45,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66272 states, 66270 states have (on average 2.6891806247170664) internal successors, (178212), 66271 states have internal predecessors, (178212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:45,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66272 states to 66272 states and 178212 transitions. [2021-07-13 18:23:45,420 INFO L78 Accepts]: Start accepts. Automaton has 66272 states and 178212 transitions. Word has length 360 [2021-07-13 18:23:45,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:45,420 INFO L482 AbstractCegarLoop]: Abstraction has 66272 states and 178212 transitions. [2021-07-13 18:23:45,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 17.695652173913043) internal successors, (407), 23 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:45,420 INFO L276 IsEmpty]: Start isEmpty. Operand 66272 states and 178212 transitions. [2021-07-13 18:23:45,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-07-13 18:23:45,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:45,533 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:23:45,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:45,734 INFO L430 AbstractCegarLoop]: === Iteration 53 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:45,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:45,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1945042650, now seen corresponding path program 20 times [2021-07-13 18:23:45,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:45,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210361496] [2021-07-13 18:23:45,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:45,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-13 18:23:46,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:46,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210361496] [2021-07-13 18:23:46,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210361496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:46,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140120770] [2021-07-13 18:23:46,330 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 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 18:23:46,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:23:46,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:46,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:46,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:23:46,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140120770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:46,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:46,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-13 18:23:46,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047783778] [2021-07-13 18:23:46,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:23:46,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:46,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:23:46,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:23:46,926 INFO L87 Difference]: Start difference. First operand 66272 states and 178212 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:47,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:47,696 INFO L93 Difference]: Finished difference Result 78842 states and 210214 transitions. [2021-07-13 18:23:47,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 18:23:47,697 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-07-13 18:23:47,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:47,855 INFO L225 Difference]: With dead ends: 78842 [2021-07-13 18:23:47,855 INFO L226 Difference]: Without dead ends: 78842 [2021-07-13 18:23:47,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 657.9ms TimeCoverageRelationStatistics Valid=425, Invalid=981, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 18:23:47,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78842 states. [2021-07-13 18:23:49,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78842 to 67632. [2021-07-13 18:23:49,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67632 states, 67630 states have (on average 2.69099512050865) internal successors, (181992), 67631 states have internal predecessors, (181992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:49,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67632 states to 67632 states and 181992 transitions. [2021-07-13 18:23:49,384 INFO L78 Accepts]: Start accepts. Automaton has 67632 states and 181992 transitions. Word has length 361 [2021-07-13 18:23:49,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:49,385 INFO L482 AbstractCegarLoop]: Abstraction has 67632 states and 181992 transitions. [2021-07-13 18:23:49,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:49,385 INFO L276 IsEmpty]: Start isEmpty. Operand 67632 states and 181992 transitions. [2021-07-13 18:23:49,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-07-13 18:23:49,503 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:49,503 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:23:49,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:49,704 INFO L430 AbstractCegarLoop]: === Iteration 54 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:49,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:49,704 INFO L82 PathProgramCache]: Analyzing trace with hash -2007813128, now seen corresponding path program 21 times [2021-07-13 18:23:49,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:49,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294617315] [2021-07-13 18:23:49,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:23:50,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:50,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294617315] [2021-07-13 18:23:50,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294617315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:50,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105957945] [2021-07-13 18:23:50,212 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 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 18:23:50,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 18:23:50,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:50,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:50,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:23:51,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105957945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:51,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:51,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-13 18:23:51,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591704412] [2021-07-13 18:23:51,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:23:51,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:51,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:23:51,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:23:51,033 INFO L87 Difference]: Start difference. First operand 67632 states and 181992 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:51,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:51,862 INFO L93 Difference]: Finished difference Result 84237 states and 223851 transitions. [2021-07-13 18:23:51,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 18:23:51,863 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-07-13 18:23:51,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:52,035 INFO L225 Difference]: With dead ends: 84237 [2021-07-13 18:23:52,035 INFO L226 Difference]: Without dead ends: 84237 [2021-07-13 18:23:52,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 614.3ms TimeCoverageRelationStatistics Valid=423, Invalid=983, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 18:23:52,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84237 states. [2021-07-13 18:23:53,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84237 to 66952. [2021-07-13 18:23:53,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66952 states, 66950 states have (on average 2.690097087378641) internal successors, (180102), 66951 states have internal predecessors, (180102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:53,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66952 states to 66952 states and 180102 transitions. [2021-07-13 18:23:53,892 INFO L78 Accepts]: Start accepts. Automaton has 66952 states and 180102 transitions. Word has length 361 [2021-07-13 18:23:53,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:53,892 INFO L482 AbstractCegarLoop]: Abstraction has 66952 states and 180102 transitions. [2021-07-13 18:23:53,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:53,893 INFO L276 IsEmpty]: Start isEmpty. Operand 66952 states and 180102 transitions. [2021-07-13 18:23:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-07-13 18:23:54,068 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:54,068 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:23:54,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-07-13 18:23:54,283 INFO L430 AbstractCegarLoop]: === Iteration 55 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:54,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:54,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1826090858, now seen corresponding path program 22 times [2021-07-13 18:23:54,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:54,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056385783] [2021-07-13 18:23:54,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:54,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:23:54,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:54,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056385783] [2021-07-13 18:23:54,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056385783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:54,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386506328] [2021-07-13 18:23:54,467 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 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 18:23:54,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:23:54,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:54,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:54,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:55,264 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:23:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:23:55,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386506328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:55,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:55,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-13 18:23:55,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111919721] [2021-07-13 18:23:55,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:23:55,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:55,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:23:55,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:23:55,653 INFO L87 Difference]: Start difference. First operand 66952 states and 180102 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:56,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:56,488 INFO L93 Difference]: Finished difference Result 87037 states and 232000 transitions. [2021-07-13 18:23:56,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:23:56,488 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-07-13 18:23:56,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:56,663 INFO L225 Difference]: With dead ends: 87037 [2021-07-13 18:23:56,663 INFO L226 Difference]: Without dead ends: 87037 [2021-07-13 18:23:56,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 257.5ms TimeCoverageRelationStatistics Valid=433, Invalid=1049, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 18:23:56,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87037 states. [2021-07-13 18:23:57,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87037 to 68212. [2021-07-13 18:23:58,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68212 states, 68210 states have (on average 2.6909690661193375) internal successors, (183551), 68211 states have internal predecessors, (183551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:58,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68212 states to 68212 states and 183551 transitions. [2021-07-13 18:23:58,257 INFO L78 Accepts]: Start accepts. Automaton has 68212 states and 183551 transitions. Word has length 361 [2021-07-13 18:23:58,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:58,257 INFO L482 AbstractCegarLoop]: Abstraction has 68212 states and 183551 transitions. [2021-07-13 18:23:58,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:58,257 INFO L276 IsEmpty]: Start isEmpty. Operand 68212 states and 183551 transitions. [2021-07-13 18:23:58,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-07-13 18:23:58,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:58,384 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:23:58,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:58,585 INFO L430 AbstractCegarLoop]: === Iteration 56 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:58,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:58,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1217432396, now seen corresponding path program 23 times [2021-07-13 18:23:58,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:58,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944412468] [2021-07-13 18:23:58,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:23:58,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:58,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944412468] [2021-07-13 18:23:58,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944412468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:58,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929397035] [2021-07-13 18:23:58,766 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 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 18:23:59,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 18:23:59,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:59,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:59,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:23:59,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929397035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:59,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:59,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-13 18:23:59,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37528032] [2021-07-13 18:23:59,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:23:59,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:59,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:23:59,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:23:59,756 INFO L87 Difference]: Start difference. First operand 68212 states and 183551 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:00,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:00,625 INFO L93 Difference]: Finished difference Result 91482 states and 243654 transitions. [2021-07-13 18:24:00,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:24:00,626 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-07-13 18:24:00,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:00,837 INFO L225 Difference]: With dead ends: 91482 [2021-07-13 18:24:00,838 INFO L226 Difference]: Without dead ends: 91482 [2021-07-13 18:24:00,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 299.8ms TimeCoverageRelationStatistics Valid=443, Invalid=1117, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 18:24:00,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91482 states. [2021-07-13 18:24:02,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91482 to 70152. [2021-07-13 18:24:02,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70152 states, 70150 states have (on average 2.692658588738418) internal successors, (188890), 70151 states have internal predecessors, (188890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:02,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70152 states to 70152 states and 188890 transitions. [2021-07-13 18:24:02,400 INFO L78 Accepts]: Start accepts. Automaton has 70152 states and 188890 transitions. Word has length 361 [2021-07-13 18:24:02,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:02,400 INFO L482 AbstractCegarLoop]: Abstraction has 70152 states and 188890 transitions. [2021-07-13 18:24:02,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:02,400 INFO L276 IsEmpty]: Start isEmpty. Operand 70152 states and 188890 transitions. [2021-07-13 18:24:02,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-07-13 18:24:02,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:02,519 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:24:02,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-13 18:24:02,721 INFO L430 AbstractCegarLoop]: === Iteration 57 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:02,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:02,721 INFO L82 PathProgramCache]: Analyzing trace with hash 245579858, now seen corresponding path program 24 times [2021-07-13 18:24:02,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:02,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373714600] [2021-07-13 18:24:02,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:24:03,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:03,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373714600] [2021-07-13 18:24:03,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373714600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:03,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547808370] [2021-07-13 18:24:03,328 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 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 18:24:03,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 18:24:03,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:03,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:24:03,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:24:04,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547808370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:04,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:04,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-13 18:24:04,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224759183] [2021-07-13 18:24:04,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:24:04,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:04,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:24:04,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:24:04,189 INFO L87 Difference]: Start difference. First operand 70152 states and 188890 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:05,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:05,079 INFO L93 Difference]: Finished difference Result 94847 states and 252707 transitions. [2021-07-13 18:24:05,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 18:24:05,080 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-07-13 18:24:05,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:05,288 INFO L225 Difference]: With dead ends: 94847 [2021-07-13 18:24:05,289 INFO L226 Difference]: Without dead ends: 94847 [2021-07-13 18:24:05,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 322.5ms TimeCoverageRelationStatistics Valid=453, Invalid=1187, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:24:05,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94847 states. [2021-07-13 18:24:06,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94847 to 73352. [2021-07-13 18:24:06,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73352 states, 73350 states have (on average 2.6949965916837084) internal successors, (197678), 73351 states have internal predecessors, (197678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:06,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73352 states to 73352 states and 197678 transitions. [2021-07-13 18:24:06,995 INFO L78 Accepts]: Start accepts. Automaton has 73352 states and 197678 transitions. Word has length 361 [2021-07-13 18:24:06,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:06,996 INFO L482 AbstractCegarLoop]: Abstraction has 73352 states and 197678 transitions. [2021-07-13 18:24:06,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:06,996 INFO L276 IsEmpty]: Start isEmpty. Operand 73352 states and 197678 transitions. [2021-07-13 18:24:07,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-07-13 18:24:07,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:07,517 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:24:07,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 18:24:07,718 INFO L430 AbstractCegarLoop]: === Iteration 58 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:07,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:07,718 INFO L82 PathProgramCache]: Analyzing trace with hash -961195152, now seen corresponding path program 25 times [2021-07-13 18:24:07,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:07,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8466155] [2021-07-13 18:24:07,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:07,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:24:07,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:07,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8466155] [2021-07-13 18:24:07,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8466155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:07,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487297880] [2021-07-13 18:24:07,876 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 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 18:24:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:08,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:24:08,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:24:08,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487297880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:08,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:08,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-13 18:24:08,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14502183] [2021-07-13 18:24:08,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:24:08,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:08,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:24:08,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:24:08,405 INFO L87 Difference]: Start difference. First operand 73352 states and 197678 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:09,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:09,314 INFO L93 Difference]: Finished difference Result 91972 states and 244941 transitions. [2021-07-13 18:24:09,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 18:24:09,314 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-07-13 18:24:09,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:09,519 INFO L225 Difference]: With dead ends: 91972 [2021-07-13 18:24:09,520 INFO L226 Difference]: Without dead ends: 91972 [2021-07-13 18:24:09,520 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 283.8ms TimeCoverageRelationStatistics Valid=463, Invalid=1259, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:24:09,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91972 states. [2021-07-13 18:24:10,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91972 to 73352. [2021-07-13 18:24:11,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73352 states, 73350 states have (on average 2.6949965916837084) internal successors, (197678), 73351 states have internal predecessors, (197678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:11,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73352 states to 73352 states and 197678 transitions. [2021-07-13 18:24:11,504 INFO L78 Accepts]: Start accepts. Automaton has 73352 states and 197678 transitions. Word has length 361 [2021-07-13 18:24:11,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:11,504 INFO L482 AbstractCegarLoop]: Abstraction has 73352 states and 197678 transitions. [2021-07-13 18:24:11,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:11,505 INFO L276 IsEmpty]: Start isEmpty. Operand 73352 states and 197678 transitions. [2021-07-13 18:24:11,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-07-13 18:24:11,619 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:11,619 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:24:11,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:24:11,821 INFO L430 AbstractCegarLoop]: === Iteration 59 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:11,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:11,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1072722418, now seen corresponding path program 26 times [2021-07-13 18:24:11,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:11,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413277548] [2021-07-13 18:24:11,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:11,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:24:11,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:11,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413277548] [2021-07-13 18:24:11,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413277548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:11,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140484838] [2021-07-13 18:24:11,981 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 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 18:24:12,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:24:12,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:12,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:24:12,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:12,770 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:24:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:24:12,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140484838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:12,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:12,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-13 18:24:12,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897857752] [2021-07-13 18:24:12,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:24:12,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:12,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:24:12,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:24:12,817 INFO L87 Difference]: Start difference. First operand 73352 states and 197678 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:13,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:13,500 INFO L93 Difference]: Finished difference Result 91272 states and 243453 transitions. [2021-07-13 18:24:13,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 18:24:13,501 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-07-13 18:24:13,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:13,889 INFO L225 Difference]: With dead ends: 91272 [2021-07-13 18:24:13,889 INFO L226 Difference]: Without dead ends: 91272 [2021-07-13 18:24:13,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 285.3ms TimeCoverageRelationStatistics Valid=473, Invalid=1333, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 18:24:14,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91272 states. [2021-07-13 18:24:15,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91272 to 72672. [2021-07-13 18:24:15,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72672 states, 72670 states have (on average 2.6942066877666164) internal successors, (195788), 72671 states have internal predecessors, (195788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:15,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72672 states to 72672 states and 195788 transitions. [2021-07-13 18:24:15,591 INFO L78 Accepts]: Start accepts. Automaton has 72672 states and 195788 transitions. Word has length 361 [2021-07-13 18:24:15,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:15,592 INFO L482 AbstractCegarLoop]: Abstraction has 72672 states and 195788 transitions. [2021-07-13 18:24:15,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:15,592 INFO L276 IsEmpty]: Start isEmpty. Operand 72672 states and 195788 transitions. [2021-07-13 18:24:15,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-07-13 18:24:15,717 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:15,717 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, 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 18:24:15,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-13 18:24:15,918 INFO L430 AbstractCegarLoop]: === Iteration 60 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:15,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:15,919 INFO L82 PathProgramCache]: Analyzing trace with hash -204708331, now seen corresponding path program 22 times [2021-07-13 18:24:15,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:15,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121028826] [2021-07-13 18:24:15,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:15,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 821 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-13 18:24:16,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:16,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121028826] [2021-07-13 18:24:16,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121028826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:16,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12646944] [2021-07-13 18:24:16,063 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 18:24:16,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:24:16,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:16,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:24:16,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:16,864 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:24:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 798 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:24:17,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12646944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:17,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:17,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-13 18:24:17,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342389912] [2021-07-13 18:24:17,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:24:17,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:17,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:24:17,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:24:17,175 INFO L87 Difference]: Start difference. First operand 72672 states and 195788 transitions. Second operand has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:17,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:17,983 INFO L93 Difference]: Finished difference Result 104087 states and 277712 transitions. [2021-07-13 18:24:17,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:24:17,984 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 385 [2021-07-13 18:24:17,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:18,244 INFO L225 Difference]: With dead ends: 104087 [2021-07-13 18:24:18,244 INFO L226 Difference]: Without dead ends: 104087 [2021-07-13 18:24:18,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 182.6ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:24:18,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104087 states. [2021-07-13 18:24:19,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104087 to 74612. [2021-07-13 18:24:19,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74612 states, 74610 states have (on average 2.6957110306929364) internal successors, (201127), 74611 states have internal predecessors, (201127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:20,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74612 states to 74612 states and 201127 transitions. [2021-07-13 18:24:20,025 INFO L78 Accepts]: Start accepts. Automaton has 74612 states and 201127 transitions. Word has length 385 [2021-07-13 18:24:20,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:20,026 INFO L482 AbstractCegarLoop]: Abstraction has 74612 states and 201127 transitions. [2021-07-13 18:24:20,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:20,026 INFO L276 IsEmpty]: Start isEmpty. Operand 74612 states and 201127 transitions. [2021-07-13 18:24:20,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-07-13 18:24:20,492 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:20,492 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, 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 18:24:20,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:24:20,715 INFO L430 AbstractCegarLoop]: === Iteration 61 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:20,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:20,715 INFO L82 PathProgramCache]: Analyzing trace with hash 262396659, now seen corresponding path program 23 times [2021-07-13 18:24:20,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:20,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161556144] [2021-07-13 18:24:20,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:20,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 821 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-13 18:24:20,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:20,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161556144] [2021-07-13 18:24:20,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161556144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:20,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306502588] [2021-07-13 18:24:20,849 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 18:24:21,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 18:24:21,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:21,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:24:21,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 798 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:24:21,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306502588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:21,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:21,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-13 18:24:21,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583884331] [2021-07-13 18:24:21,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:24:21,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:21,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:24:21,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:24:21,488 INFO L87 Difference]: Start difference. First operand 74612 states and 201127 transitions. Second operand has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:22,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:22,401 INFO L93 Difference]: Finished difference Result 111247 states and 297294 transitions. [2021-07-13 18:24:22,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:24:22,401 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 385 [2021-07-13 18:24:22,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:22,675 INFO L225 Difference]: With dead ends: 111247 [2021-07-13 18:24:22,675 INFO L226 Difference]: Without dead ends: 111247 [2021-07-13 18:24:22,675 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 198.1ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:24:23,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111247 states. [2021-07-13 18:24:24,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111247 to 75972. [2021-07-13 18:24:24,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75972 states, 75970 states have (on average 2.697209424772937) internal successors, (204907), 75971 states have internal predecessors, (204907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:24,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75972 states to 75972 states and 204907 transitions. [2021-07-13 18:24:24,796 INFO L78 Accepts]: Start accepts. Automaton has 75972 states and 204907 transitions. Word has length 385 [2021-07-13 18:24:24,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:24,796 INFO L482 AbstractCegarLoop]: Abstraction has 75972 states and 204907 transitions. [2021-07-13 18:24:24,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:24,796 INFO L276 IsEmpty]: Start isEmpty. Operand 75972 states and 204907 transitions. [2021-07-13 18:24:24,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-07-13 18:24:24,931 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:24,932 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, 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 18:24:25,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-07-13 18:24:25,133 INFO L430 AbstractCegarLoop]: === Iteration 62 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:25,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:25,134 INFO L82 PathProgramCache]: Analyzing trace with hash -94568939, now seen corresponding path program 24 times [2021-07-13 18:24:25,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:25,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072037809] [2021-07-13 18:24:25,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 821 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-13 18:24:25,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:25,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072037809] [2021-07-13 18:24:25,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072037809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:25,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804221270] [2021-07-13 18:24:25,658 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 18:24:26,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 18:24:26,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:26,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:24:26,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:26,582 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 798 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:24:26,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804221270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:26,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:26,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-13 18:24:26,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089946458] [2021-07-13 18:24:26,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:24:26,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:26,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:24:26,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:24:26,584 INFO L87 Difference]: Start difference. First operand 75972 states and 204907 transitions. Second operand has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:27,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:27,373 INFO L93 Difference]: Finished difference Result 96182 states and 255392 transitions. [2021-07-13 18:24:27,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:24:27,373 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 385 [2021-07-13 18:24:27,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:27,603 INFO L225 Difference]: With dead ends: 96182 [2021-07-13 18:24:27,603 INFO L226 Difference]: Without dead ends: 96182 [2021-07-13 18:24:27,603 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 560.4ms TimeCoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:24:27,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96182 states. [2021-07-13 18:24:29,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96182 to 70352. [2021-07-13 18:24:29,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70352 states, 70350 states have (on average 2.693901918976546) internal successors, (189516), 70351 states have internal predecessors, (189516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:29,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70352 states to 70352 states and 189516 transitions. [2021-07-13 18:24:29,336 INFO L78 Accepts]: Start accepts. Automaton has 70352 states and 189516 transitions. Word has length 385 [2021-07-13 18:24:29,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:29,337 INFO L482 AbstractCegarLoop]: Abstraction has 70352 states and 189516 transitions. [2021-07-13 18:24:29,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:29,337 INFO L276 IsEmpty]: Start isEmpty. Operand 70352 states and 189516 transitions. [2021-07-13 18:24:29,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-07-13 18:24:29,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:29,822 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, 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 18:24:30,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:24:30,046 INFO L430 AbstractCegarLoop]: === Iteration 63 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:30,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:30,046 INFO L82 PathProgramCache]: Analyzing trace with hash 420103411, now seen corresponding path program 25 times [2021-07-13 18:24:30,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:30,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476392159] [2021-07-13 18:24:30,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 798 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:24:30,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:30,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476392159] [2021-07-13 18:24:30,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476392159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:30,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824442844] [2021-07-13 18:24:30,174 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 18:24:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:30,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:24:30,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:30,730 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 798 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:24:30,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824442844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:30,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:30,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-13 18:24:30,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911548491] [2021-07-13 18:24:30,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:24:30,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:30,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:24:30,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:24:30,732 INFO L87 Difference]: Start difference. First operand 70352 states and 189516 transitions. Second operand has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:31,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:31,630 INFO L93 Difference]: Finished difference Result 110607 states and 294134 transitions. [2021-07-13 18:24:31,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:24:31,630 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 385 [2021-07-13 18:24:31,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:31,896 INFO L225 Difference]: With dead ends: 110607 [2021-07-13 18:24:31,896 INFO L226 Difference]: Without dead ends: 110607 [2021-07-13 18:24:31,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:24:32,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110607 states. [2021-07-13 18:24:33,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110607 to 79172. [2021-07-13 18:24:33,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79172 states, 79170 states have (on average 2.6996463306808134) internal successors, (213731), 79171 states have internal predecessors, (213731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:34,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79172 states to 79172 states and 213731 transitions. [2021-07-13 18:24:34,134 INFO L78 Accepts]: Start accepts. Automaton has 79172 states and 213731 transitions. Word has length 385 [2021-07-13 18:24:34,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:34,134 INFO L482 AbstractCegarLoop]: Abstraction has 79172 states and 213731 transitions. [2021-07-13 18:24:34,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:34,134 INFO L276 IsEmpty]: Start isEmpty. Operand 79172 states and 213731 transitions. [2021-07-13 18:24:34,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-13 18:24:34,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:34,273 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, 2, 2, 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 18:24:34,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-07-13 18:24:34,474 INFO L430 AbstractCegarLoop]: === Iteration 64 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:34,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:34,474 INFO L82 PathProgramCache]: Analyzing trace with hash 143556378, now seen corresponding path program 26 times [2021-07-13 18:24:34,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:34,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463058050] [2021-07-13 18:24:34,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:35,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1053 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-13 18:24:35,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:35,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463058050] [2021-07-13 18:24:35,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463058050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:35,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248639436] [2021-07-13 18:24:35,077 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 18:24:35,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:24:35,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:35,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:24:35,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:35,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:24:35,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248639436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:35,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:35,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-13 18:24:35,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761536387] [2021-07-13 18:24:35,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:24:35,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:35,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:24:35,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:24:35,679 INFO L87 Difference]: Start difference. First operand 79172 states and 213731 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:36,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:36,673 INFO L93 Difference]: Finished difference Result 110172 states and 294666 transitions. [2021-07-13 18:24:36,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:24:36,674 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-13 18:24:36,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:37,029 INFO L225 Difference]: With dead ends: 110172 [2021-07-13 18:24:37,030 INFO L226 Difference]: Without dead ends: 110172 [2021-07-13 18:24:37,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 647.1ms TimeCoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 18:24:37,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110172 states. [2021-07-13 18:24:38,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110172 to 79852. [2021-07-13 18:24:39,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79852 states, 79850 states have (on average 2.7003256105197244) internal successors, (215621), 79851 states have internal predecessors, (215621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:39,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79852 states to 79852 states and 215621 transitions. [2021-07-13 18:24:39,318 INFO L78 Accepts]: Start accepts. Automaton has 79852 states and 215621 transitions. Word has length 390 [2021-07-13 18:24:39,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:39,319 INFO L482 AbstractCegarLoop]: Abstraction has 79852 states and 215621 transitions. [2021-07-13 18:24:39,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:39,319 INFO L276 IsEmpty]: Start isEmpty. Operand 79852 states and 215621 transitions. [2021-07-13 18:24:39,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-13 18:24:39,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:39,470 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, 2, 2, 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 18:24:39,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:24:39,670 INFO L430 AbstractCegarLoop]: === Iteration 65 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:39,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:39,671 INFO L82 PathProgramCache]: Analyzing trace with hash -213409220, now seen corresponding path program 27 times [2021-07-13 18:24:39,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:39,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009424009] [2021-07-13 18:24:39,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:39,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:39,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1053 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-13 18:24:39,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:39,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009424009] [2021-07-13 18:24:39,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009424009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:39,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455108342] [2021-07-13 18:24:39,839 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 18:24:40,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 18:24:40,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:40,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:24:40,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:40,656 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:24:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:24:40,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455108342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:40,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:40,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-13 18:24:40,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909714458] [2021-07-13 18:24:40,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:24:40,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:40,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:24:40,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:24:40,939 INFO L87 Difference]: Start difference. First operand 79852 states and 215621 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:41,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:41,833 INFO L93 Difference]: Finished difference Result 114067 states and 305249 transitions. [2021-07-13 18:24:41,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:24:41,833 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-13 18:24:41,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:42,111 INFO L225 Difference]: With dead ends: 114067 [2021-07-13 18:24:42,111 INFO L226 Difference]: Without dead ends: 114067 [2021-07-13 18:24:42,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 252.3ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 18:24:42,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114067 states. [2021-07-13 18:24:43,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114067 to 79852. [2021-07-13 18:24:43,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79852 states, 79850 states have (on average 2.7003256105197244) internal successors, (215621), 79851 states have internal predecessors, (215621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:44,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79852 states to 79852 states and 215621 transitions. [2021-07-13 18:24:44,430 INFO L78 Accepts]: Start accepts. Automaton has 79852 states and 215621 transitions. Word has length 390 [2021-07-13 18:24:44,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:44,431 INFO L482 AbstractCegarLoop]: Abstraction has 79852 states and 215621 transitions. [2021-07-13 18:24:44,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:44,431 INFO L276 IsEmpty]: Start isEmpty. Operand 79852 states and 215621 transitions. [2021-07-13 18:24:44,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-13 18:24:44,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:44,572 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, 2, 2, 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 18:24:44,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-13 18:24:44,773 INFO L430 AbstractCegarLoop]: === Iteration 66 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:44,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:44,773 INFO L82 PathProgramCache]: Analyzing trace with hash 985758942, now seen corresponding path program 28 times [2021-07-13 18:24:44,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:44,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399756241] [2021-07-13 18:24:44,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:44,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1053 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-13 18:24:44,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:44,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399756241] [2021-07-13 18:24:44,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399756241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:44,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644675666] [2021-07-13 18:24:44,932 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 18:24:45,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:24:45,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:45,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:24:45,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:45,849 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:24:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:24:46,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644675666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:46,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:46,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-13 18:24:46,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239058059] [2021-07-13 18:24:46,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:24:46,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:46,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:24:46,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:24:46,056 INFO L87 Difference]: Start difference. First operand 79852 states and 215621 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:46,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:46,965 INFO L93 Difference]: Finished difference Result 115432 states and 309095 transitions. [2021-07-13 18:24:46,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 18:24:46,965 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-13 18:24:46,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:47,250 INFO L225 Difference]: With dead ends: 115432 [2021-07-13 18:24:47,251 INFO L226 Difference]: Without dead ends: 115432 [2021-07-13 18:24:47,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 252.1ms TimeCoverageRelationStatistics Valid=373, Invalid=1033, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 18:24:47,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115432 states. [2021-07-13 18:24:48,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115432 to 78592. [2021-07-13 18:24:49,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78592 states, 78590 states have (on average 2.6997327904313524) internal successors, (212172), 78591 states have internal predecessors, (212172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:49,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78592 states to 78592 states and 212172 transitions. [2021-07-13 18:24:49,563 INFO L78 Accepts]: Start accepts. Automaton has 78592 states and 212172 transitions. Word has length 390 [2021-07-13 18:24:49,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:49,563 INFO L482 AbstractCegarLoop]: Abstraction has 78592 states and 212172 transitions. [2021-07-13 18:24:49,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:49,564 INFO L276 IsEmpty]: Start isEmpty. Operand 78592 states and 212172 transitions. [2021-07-13 18:24:49,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-13 18:24:49,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:49,692 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, 2, 2, 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 18:24:49,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:24:49,897 INFO L430 AbstractCegarLoop]: === Iteration 67 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:49,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:49,897 INFO L82 PathProgramCache]: Analyzing trace with hash 208547584, now seen corresponding path program 29 times [2021-07-13 18:24:49,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:49,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34244703] [2021-07-13 18:24:49,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1053 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-13 18:24:50,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:50,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34244703] [2021-07-13 18:24:50,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34244703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:50,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926817904] [2021-07-13 18:24:50,059 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 18:24:50,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 18:24:50,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:50,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:24:50,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:51,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:24:51,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926817904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:51,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:51,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-13 18:24:51,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103893920] [2021-07-13 18:24:51,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:24:51,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:51,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:24:51,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:24:51,011 INFO L87 Difference]: Start difference. First operand 78592 states and 212172 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:51,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:51,935 INFO L93 Difference]: Finished difference Result 113602 states and 303457 transitions. [2021-07-13 18:24:51,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:24:51,935 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-13 18:24:51,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:52,237 INFO L225 Difference]: With dead ends: 113602 [2021-07-13 18:24:52,237 INFO L226 Difference]: Without dead ends: 113602 [2021-07-13 18:24:52,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 235.9ms TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:24:52,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113602 states. [2021-07-13 18:24:53,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113602 to 79852. [2021-07-13 18:24:54,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79852 states, 79850 states have (on average 2.7003256105197244) internal successors, (215621), 79851 states have internal predecessors, (215621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:54,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79852 states to 79852 states and 215621 transitions. [2021-07-13 18:24:54,564 INFO L78 Accepts]: Start accepts. Automaton has 79852 states and 215621 transitions. Word has length 390 [2021-07-13 18:24:54,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:54,565 INFO L482 AbstractCegarLoop]: Abstraction has 79852 states and 215621 transitions. [2021-07-13 18:24:54,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:54,565 INFO L276 IsEmpty]: Start isEmpty. Operand 79852 states and 215621 transitions. [2021-07-13 18:24:54,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-13 18:24:54,736 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:54,736 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, 2, 2, 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 18:24:54,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 18:24:54,937 INFO L430 AbstractCegarLoop]: === Iteration 68 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:54,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:54,937 INFO L82 PathProgramCache]: Analyzing trace with hash -784869214, now seen corresponding path program 30 times [2021-07-13 18:24:54,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:54,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647753007] [2021-07-13 18:24:54,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:54,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1053 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-13 18:24:55,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:55,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647753007] [2021-07-13 18:24:55,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647753007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:55,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956586944] [2021-07-13 18:24:55,102 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 18:24:55,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 18:24:55,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:55,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:24:55,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:24:55,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956586944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:55,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:55,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-13 18:24:55,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57537174] [2021-07-13 18:24:55,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:24:55,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:55,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:24:55,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:24:55,953 INFO L87 Difference]: Start difference. First operand 79852 states and 215621 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:56,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:56,880 INFO L93 Difference]: Finished difference Result 102417 states and 272783 transitions. [2021-07-13 18:24:56,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:24:56,881 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-13 18:24:56,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:57,120 INFO L225 Difference]: With dead ends: 102417 [2021-07-13 18:24:57,120 INFO L226 Difference]: Without dead ends: 102417 [2021-07-13 18:24:57,120 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 235.7ms TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:24:57,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102417 states. [2021-07-13 18:24:58,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102417 to 77232. [2021-07-13 18:24:58,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77232 states, 77230 states have (on average 2.698329664638094) internal successors, (208392), 77231 states have internal predecessors, (208392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:59,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77232 states to 77232 states and 208392 transitions. [2021-07-13 18:24:59,159 INFO L78 Accepts]: Start accepts. Automaton has 77232 states and 208392 transitions. Word has length 390 [2021-07-13 18:24:59,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:59,160 INFO L482 AbstractCegarLoop]: Abstraction has 77232 states and 208392 transitions. [2021-07-13 18:24:59,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:59,160 INFO L276 IsEmpty]: Start isEmpty. Operand 77232 states and 208392 transitions. [2021-07-13 18:24:59,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-13 18:24:59,297 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:59,297 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, 2, 2, 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 18:24:59,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 18:24:59,498 INFO L430 AbstractCegarLoop]: === Iteration 69 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:59,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:59,498 INFO L82 PathProgramCache]: Analyzing trace with hash -266388740, now seen corresponding path program 31 times [2021-07-13 18:24:59,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:59,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080472013] [2021-07-13 18:24:59,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:25:00,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:00,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080472013] [2021-07-13 18:25:00,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080472013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:00,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702606791] [2021-07-13 18:25:00,050 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 18:25:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:00,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:00,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:25:00,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702606791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:00,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:00,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:25:00,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795560868] [2021-07-13 18:25:00,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:25:00,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:00,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:25:00,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:25:00,611 INFO L87 Difference]: Start difference. First operand 77232 states and 208392 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:01,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:01,584 INFO L93 Difference]: Finished difference Result 120732 states and 322804 transitions. [2021-07-13 18:25:01,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:25:01,585 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-13 18:25:01,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:01,881 INFO L225 Difference]: With dead ends: 120732 [2021-07-13 18:25:01,881 INFO L226 Difference]: Without dead ends: 120732 [2021-07-13 18:25:01,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 263.2ms TimeCoverageRelationStatistics Valid=377, Invalid=1105, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 18:25:02,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120732 states. [2021-07-13 18:25:03,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120732 to 80532. [2021-07-13 18:25:04,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80532 states, 80530 states have (on average 2.7009934186017635) internal successors, (217511), 80531 states have internal predecessors, (217511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:04,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80532 states to 80532 states and 217511 transitions. [2021-07-13 18:25:04,233 INFO L78 Accepts]: Start accepts. Automaton has 80532 states and 217511 transitions. Word has length 390 [2021-07-13 18:25:04,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:04,233 INFO L482 AbstractCegarLoop]: Abstraction has 80532 states and 217511 transitions. [2021-07-13 18:25:04,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:04,234 INFO L276 IsEmpty]: Start isEmpty. Operand 80532 states and 217511 transitions. [2021-07-13 18:25:04,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-13 18:25:04,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:04,378 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, 2, 2, 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 18:25:04,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 18:25:04,579 INFO L430 AbstractCegarLoop]: === Iteration 70 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:04,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:04,579 INFO L82 PathProgramCache]: Analyzing trace with hash -623354338, now seen corresponding path program 32 times [2021-07-13 18:25:04,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:04,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728059169] [2021-07-13 18:25:04,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:05,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:25:05,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:05,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728059169] [2021-07-13 18:25:05,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728059169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:05,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200303000] [2021-07-13 18:25:05,170 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 18:25:05,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:25:05,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:05,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:05,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:25:05,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200303000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:05,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:05,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:25:05,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011274604] [2021-07-13 18:25:05,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:25:05,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:05,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:25:05,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:25:05,745 INFO L87 Difference]: Start difference. First operand 80532 states and 217511 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:06,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:06,729 INFO L93 Difference]: Finished difference Result 125277 states and 335467 transitions. [2021-07-13 18:25:06,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 18:25:06,730 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-13 18:25:06,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:07,074 INFO L225 Difference]: With dead ends: 125277 [2021-07-13 18:25:07,075 INFO L226 Difference]: Without dead ends: 125277 [2021-07-13 18:25:07,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 454.7ms TimeCoverageRelationStatistics Valid=368, Invalid=1038, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 18:25:07,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125277 states. [2021-07-13 18:25:09,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125277 to 79852. [2021-07-13 18:25:09,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79852 states, 79850 states have (on average 2.7003256105197244) internal successors, (215621), 79851 states have internal predecessors, (215621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:09,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79852 states to 79852 states and 215621 transitions. [2021-07-13 18:25:09,385 INFO L78 Accepts]: Start accepts. Automaton has 79852 states and 215621 transitions. Word has length 390 [2021-07-13 18:25:09,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:09,386 INFO L482 AbstractCegarLoop]: Abstraction has 79852 states and 215621 transitions. [2021-07-13 18:25:09,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:09,386 INFO L276 IsEmpty]: Start isEmpty. Operand 79852 states and 215621 transitions. [2021-07-13 18:25:09,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-13 18:25:09,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:09,530 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, 2, 2, 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 18:25:09,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:09,731 INFO L430 AbstractCegarLoop]: === Iteration 71 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:09,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:09,731 INFO L82 PathProgramCache]: Analyzing trace with hash 575813824, now seen corresponding path program 33 times [2021-07-13 18:25:09,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:09,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993401835] [2021-07-13 18:25:09,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:10,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:25:10,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:10,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993401835] [2021-07-13 18:25:10,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993401835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:10,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185624957] [2021-07-13 18:25:10,280 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 18:25:10,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 18:25:10,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:10,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:10,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:25:11,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185624957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:11,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:11,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:25:11,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153253588] [2021-07-13 18:25:11,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:25:11,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:11,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:25:11,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:25:11,046 INFO L87 Difference]: Start difference. First operand 79852 states and 215621 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:12,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:12,011 INFO L93 Difference]: Finished difference Result 125532 states and 336473 transitions. [2021-07-13 18:25:12,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:25:12,011 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-13 18:25:12,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:12,305 INFO L225 Difference]: With dead ends: 125532 [2021-07-13 18:25:12,305 INFO L226 Difference]: Without dead ends: 125532 [2021-07-13 18:25:12,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 632.8ms TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:25:12,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125532 states. [2021-07-13 18:25:14,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125532 to 82372. [2021-07-13 18:25:14,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82372 states, 82370 states have (on average 2.7014568410829187) internal successors, (222519), 82371 states have internal predecessors, (222519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:14,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82372 states to 82372 states and 222519 transitions. [2021-07-13 18:25:14,560 INFO L78 Accepts]: Start accepts. Automaton has 82372 states and 222519 transitions. Word has length 390 [2021-07-13 18:25:14,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:14,561 INFO L482 AbstractCegarLoop]: Abstraction has 82372 states and 222519 transitions. [2021-07-13 18:25:14,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:14,561 INFO L276 IsEmpty]: Start isEmpty. Operand 82372 states and 222519 transitions. [2021-07-13 18:25:14,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-13 18:25:14,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:14,705 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, 2, 2, 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 18:25:14,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:14,909 INFO L430 AbstractCegarLoop]: === Iteration 72 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:14,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:14,909 INFO L82 PathProgramCache]: Analyzing trace with hash -201397534, now seen corresponding path program 34 times [2021-07-13 18:25:14,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:14,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600563303] [2021-07-13 18:25:14,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:14,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:25:15,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:15,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600563303] [2021-07-13 18:25:15,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600563303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:15,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659460197] [2021-07-13 18:25:15,488 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 18:25:15,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:25:15,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:15,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:15,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:25:16,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659460197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:16,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:16,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:25:16,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795354063] [2021-07-13 18:25:16,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:25:16,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:16,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:25:16,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:25:16,308 INFO L87 Difference]: Start difference. First operand 82372 states and 222519 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:17,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:17,180 INFO L93 Difference]: Finished difference Result 110512 states and 294631 transitions. [2021-07-13 18:25:17,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:25:17,180 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-13 18:25:17,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:17,443 INFO L225 Difference]: With dead ends: 110512 [2021-07-13 18:25:17,444 INFO L226 Difference]: Without dead ends: 110512 [2021-07-13 18:25:17,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 237.3ms TimeCoverageRelationStatistics Valid=361, Invalid=971, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:25:17,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110512 states. [2021-07-13 18:25:19,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110512 to 80912. [2021-07-13 18:25:19,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80912 states, 80910 states have (on average 2.699839327648004) internal successors, (218444), 80911 states have internal predecessors, (218444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:19,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80912 states to 80912 states and 218444 transitions. [2021-07-13 18:25:19,722 INFO L78 Accepts]: Start accepts. Automaton has 80912 states and 218444 transitions. Word has length 390 [2021-07-13 18:25:19,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:19,723 INFO L482 AbstractCegarLoop]: Abstraction has 80912 states and 218444 transitions. [2021-07-13 18:25:19,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:19,723 INFO L276 IsEmpty]: Start isEmpty. Operand 80912 states and 218444 transitions. [2021-07-13 18:25:20,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-13 18:25:20,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:20,325 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, 2, 2, 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 18:25:20,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:20,529 INFO L430 AbstractCegarLoop]: === Iteration 73 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:20,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:20,529 INFO L82 PathProgramCache]: Analyzing trace with hash -2067034274, now seen corresponding path program 35 times [2021-07-13 18:25:20,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:20,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113933095] [2021-07-13 18:25:20,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:25:20,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:20,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113933095] [2021-07-13 18:25:20,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113933095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:20,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031814554] [2021-07-13 18:25:20,677 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 18:25:20,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 18:25:20,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:20,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:20,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:21,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:25:21,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031814554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:21,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:21,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:25:21,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685086954] [2021-07-13 18:25:21,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:25:21,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:21,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:25:21,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:25:21,404 INFO L87 Difference]: Start difference. First operand 80912 states and 218444 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:22,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:22,537 INFO L93 Difference]: Finished difference Result 137412 states and 368979 transitions. [2021-07-13 18:25:22,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:25:22,538 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-13 18:25:22,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:23,131 INFO L225 Difference]: With dead ends: 137412 [2021-07-13 18:25:23,132 INFO L226 Difference]: Without dead ends: 137412 [2021-07-13 18:25:23,132 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 251.9ms TimeCoverageRelationStatistics Valid=378, Invalid=1104, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 18:25:23,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137412 states. [2021-07-13 18:25:25,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137412 to 86832. [2021-07-13 18:25:25,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86832 states, 86830 states have (on average 2.704042381665323) internal successors, (234792), 86831 states have internal predecessors, (234792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:25,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86832 states to 86832 states and 234792 transitions. [2021-07-13 18:25:25,721 INFO L78 Accepts]: Start accepts. Automaton has 86832 states and 234792 transitions. Word has length 390 [2021-07-13 18:25:25,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:25,721 INFO L482 AbstractCegarLoop]: Abstraction has 86832 states and 234792 transitions. [2021-07-13 18:25:25,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:25,721 INFO L276 IsEmpty]: Start isEmpty. Operand 86832 states and 234792 transitions. [2021-07-13 18:25:25,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-13 18:25:25,884 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:25,885 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, 2, 2, 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 18:25:26,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-07-13 18:25:26,085 INFO L430 AbstractCegarLoop]: === Iteration 74 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:26,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:26,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1870967424, now seen corresponding path program 36 times [2021-07-13 18:25:26,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:26,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987004018] [2021-07-13 18:25:26,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:26,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:25:26,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:26,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987004018] [2021-07-13 18:25:26,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987004018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:26,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100843561] [2021-07-13 18:25:26,245 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 18:25:27,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 18:25:27,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:27,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:27,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:25:27,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100843561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:27,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:27,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:25:27,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193865726] [2021-07-13 18:25:27,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:25:27,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:27,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:25:27,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:25:27,508 INFO L87 Difference]: Start difference. First operand 86832 states and 234792 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:28,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:28,593 INFO L93 Difference]: Finished difference Result 144457 states and 388581 transitions. [2021-07-13 18:25:28,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 18:25:28,594 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-13 18:25:28,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:29,016 INFO L225 Difference]: With dead ends: 144457 [2021-07-13 18:25:29,016 INFO L226 Difference]: Without dead ends: 144457 [2021-07-13 18:25:29,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 242.7ms TimeCoverageRelationStatistics Valid=369, Invalid=1037, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 18:25:29,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144457 states. [2021-07-13 18:25:31,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144457 to 87412. [2021-07-13 18:25:31,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87412 states, 87410 states have (on average 2.7039354764901042) internal successors, (236351), 87411 states have internal predecessors, (236351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:31,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87412 states to 87412 states and 236351 transitions. [2021-07-13 18:25:31,814 INFO L78 Accepts]: Start accepts. Automaton has 87412 states and 236351 transitions. Word has length 390 [2021-07-13 18:25:31,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:31,815 INFO L482 AbstractCegarLoop]: Abstraction has 87412 states and 236351 transitions. [2021-07-13 18:25:31,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:31,815 INFO L276 IsEmpty]: Start isEmpty. Operand 87412 states and 236351 transitions. [2021-07-13 18:25:31,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-13 18:25:31,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:31,983 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, 2, 2, 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 18:25:32,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:32,185 INFO L430 AbstractCegarLoop]: === Iteration 75 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:32,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:32,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1224831710, now seen corresponding path program 37 times [2021-07-13 18:25:32,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:32,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517139853] [2021-07-13 18:25:32,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:25:32,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:32,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517139853] [2021-07-13 18:25:32,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517139853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:32,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949267949] [2021-07-13 18:25:32,330 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 18:25:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:32,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:32,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:25:32,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949267949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:32,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:32,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:25:32,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132182838] [2021-07-13 18:25:32,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:25:32,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:32,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:25:32,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:25:33,139 INFO L87 Difference]: Start difference. First operand 87412 states and 236351 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:34,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:34,000 INFO L93 Difference]: Finished difference Result 116352 states and 311553 transitions. [2021-07-13 18:25:34,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 18:25:34,001 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-13 18:25:34,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:34,585 INFO L225 Difference]: With dead ends: 116352 [2021-07-13 18:25:34,585 INFO L226 Difference]: Without dead ends: 116352 [2021-07-13 18:25:34,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 240.5ms TimeCoverageRelationStatistics Valid=371, Invalid=1035, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 18:25:34,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116352 states. [2021-07-13 18:25:36,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116352 to 85952. [2021-07-13 18:25:36,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85952 states, 85950 states have (on average 2.702454915648633) internal successors, (232276), 85951 states have internal predecessors, (232276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:36,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85952 states to 85952 states and 232276 transitions. [2021-07-13 18:25:36,995 INFO L78 Accepts]: Start accepts. Automaton has 85952 states and 232276 transitions. Word has length 390 [2021-07-13 18:25:36,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:36,995 INFO L482 AbstractCegarLoop]: Abstraction has 85952 states and 232276 transitions. [2021-07-13 18:25:36,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:36,995 INFO L276 IsEmpty]: Start isEmpty. Operand 85952 states and 232276 transitions. [2021-07-13 18:25:37,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-13 18:25:37,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:37,160 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, 2, 2, 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 18:25:37,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:37,361 INFO L430 AbstractCegarLoop]: === Iteration 76 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:37,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:37,362 INFO L82 PathProgramCache]: Analyzing trace with hash 446798912, now seen corresponding path program 38 times [2021-07-13 18:25:37,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:37,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45837065] [2021-07-13 18:25:37,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:37,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:25:37,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:37,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45837065] [2021-07-13 18:25:37,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45837065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:37,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307200281] [2021-07-13 18:25:37,514 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 18:25:37,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:25:37,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:37,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:37,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:38,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:25:38,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307200281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:38,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:38,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:25:38,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933641509] [2021-07-13 18:25:38,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:25:38,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:38,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:25:38,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:25:38,397 INFO L87 Difference]: Start difference. First operand 85952 states and 232276 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:39,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:39,524 INFO L93 Difference]: Finished difference Result 149432 states and 401906 transitions. [2021-07-13 18:25:39,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:25:39,524 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-13 18:25:39,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:39,932 INFO L225 Difference]: With dead ends: 149432 [2021-07-13 18:25:39,932 INFO L226 Difference]: Without dead ends: 149432 [2021-07-13 18:25:39,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 247.7ms TimeCoverageRelationStatistics Valid=379, Invalid=1103, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 18:25:40,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149432 states. [2021-07-13 18:25:42,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149432 to 88572. [2021-07-13 18:25:42,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88572 states, 88570 states have (on average 2.704132324714915) internal successors, (239505), 88571 states have internal predecessors, (239505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:42,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88572 states to 88572 states and 239505 transitions. [2021-07-13 18:25:42,882 INFO L78 Accepts]: Start accepts. Automaton has 88572 states and 239505 transitions. Word has length 390 [2021-07-13 18:25:42,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:42,883 INFO L482 AbstractCegarLoop]: Abstraction has 88572 states and 239505 transitions. [2021-07-13 18:25:42,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:42,883 INFO L276 IsEmpty]: Start isEmpty. Operand 88572 states and 239505 transitions. [2021-07-13 18:25:43,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-13 18:25:43,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:43,070 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, 2, 2, 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 18:25:43,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:43,270 INFO L430 AbstractCegarLoop]: === Iteration 77 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:43,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:43,271 INFO L82 PathProgramCache]: Analyzing trace with hash 89833314, now seen corresponding path program 39 times [2021-07-13 18:25:43,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:43,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097173883] [2021-07-13 18:25:43,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:25:43,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:43,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097173883] [2021-07-13 18:25:43,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097173883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:43,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438032960] [2021-07-13 18:25:43,416 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 18:25:43,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 18:25:43,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:43,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:43,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:25:44,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438032960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:44,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:44,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:25:44,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279165494] [2021-07-13 18:25:44,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:25:44,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:44,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:25:44,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:25:44,192 INFO L87 Difference]: Start difference. First operand 88572 states and 239505 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:45,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:45,210 INFO L93 Difference]: Finished difference Result 127447 states and 340869 transitions. [2021-07-13 18:25:45,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:25:45,211 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-13 18:25:45,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:45,772 INFO L225 Difference]: With dead ends: 127447 [2021-07-13 18:25:45,773 INFO L226 Difference]: Without dead ends: 127447 [2021-07-13 18:25:45,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 247.5ms TimeCoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 18:25:45,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127447 states. [2021-07-13 18:25:47,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127447 to 85492. [2021-07-13 18:25:47,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85492 states, 85490 states have (on average 2.7005614691776816) internal successors, (230871), 85491 states have internal predecessors, (230871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:48,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85492 states to 85492 states and 230871 transitions. [2021-07-13 18:25:48,212 INFO L78 Accepts]: Start accepts. Automaton has 85492 states and 230871 transitions. Word has length 390 [2021-07-13 18:25:48,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:48,213 INFO L482 AbstractCegarLoop]: Abstraction has 85492 states and 230871 transitions. [2021-07-13 18:25:48,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:48,213 INFO L276 IsEmpty]: Start isEmpty. Operand 85492 states and 230871 transitions. [2021-07-13 18:25:48,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-13 18:25:48,380 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:48,380 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, 2, 2, 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 18:25:48,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-13 18:25:48,581 INFO L430 AbstractCegarLoop]: === Iteration 78 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:48,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:48,581 INFO L82 PathProgramCache]: Analyzing trace with hash -751337054, now seen corresponding path program 40 times [2021-07-13 18:25:48,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:48,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388579167] [2021-07-13 18:25:48,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:48,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:25:48,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:48,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388579167] [2021-07-13 18:25:48,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388579167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:48,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951708025] [2021-07-13 18:25:48,725 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 18:25:49,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:25:49,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:49,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:49,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:25:49,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951708025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:49,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:49,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:25:49,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109924418] [2021-07-13 18:25:49,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:25:49,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:49,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:25:49,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:25:49,872 INFO L87 Difference]: Start difference. First operand 85492 states and 230871 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:50,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:50,809 INFO L93 Difference]: Finished difference Result 110267 states and 294603 transitions. [2021-07-13 18:25:50,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:25:50,809 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-13 18:25:50,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:51,085 INFO L225 Difference]: With dead ends: 110267 [2021-07-13 18:25:51,085 INFO L226 Difference]: Without dead ends: 110267 [2021-07-13 18:25:51,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 254.3ms TimeCoverageRelationStatistics Valid=391, Invalid=1169, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 18:25:51,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110267 states. [2021-07-13 18:25:53,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110267 to 86752. [2021-07-13 18:25:53,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86752 states, 86750 states have (on average 2.701095100864553) internal successors, (234320), 86751 states have internal predecessors, (234320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:53,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86752 states to 86752 states and 234320 transitions. [2021-07-13 18:25:53,483 INFO L78 Accepts]: Start accepts. Automaton has 86752 states and 234320 transitions. Word has length 390 [2021-07-13 18:25:53,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:53,483 INFO L482 AbstractCegarLoop]: Abstraction has 86752 states and 234320 transitions. [2021-07-13 18:25:53,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:53,484 INFO L276 IsEmpty]: Start isEmpty. Operand 86752 states and 234320 transitions. [2021-07-13 18:25:53,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2021-07-13 18:25:53,640 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:53,640 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:25:53,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:53,843 INFO L430 AbstractCegarLoop]: === Iteration 79 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:53,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:53,844 INFO L82 PathProgramCache]: Analyzing trace with hash 657247387, now seen corresponding path program 10 times [2021-07-13 18:25:53,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:53,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723073264] [2021-07-13 18:25:53,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:54,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1680 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:25:54,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:54,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723073264] [2021-07-13 18:25:54,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723073264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:54,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736356297] [2021-07-13 18:25:54,061 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 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 18:25:54,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:25:54,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:54,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:54,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1680 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:25:55,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736356297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:55,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:55,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-07-13 18:25:55,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063038963] [2021-07-13 18:25:55,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 18:25:55,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:55,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 18:25:55,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-07-13 18:25:55,410 INFO L87 Difference]: Start difference. First operand 86752 states and 234320 transitions. Second operand has 25 states, 25 states have (on average 17.64) internal successors, (441), 25 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:56,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:56,348 INFO L93 Difference]: Finished difference Result 98251 states and 263785 transitions. [2021-07-13 18:25:56,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 18:25:56,348 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 17.64) internal successors, (441), 25 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 394 [2021-07-13 18:25:56,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:56,547 INFO L225 Difference]: With dead ends: 98251 [2021-07-13 18:25:56,547 INFO L226 Difference]: Without dead ends: 98251 [2021-07-13 18:25:56,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 375.4ms TimeCoverageRelationStatistics Valid=716, Invalid=1446, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 18:25:56,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98251 states. [2021-07-13 18:25:58,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98251 to 89234. [2021-07-13 18:25:58,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89234 states, 89232 states have (on average 2.6988076026537566) internal successors, (240820), 89233 states have internal predecessors, (240820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:58,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89234 states to 89234 states and 240820 transitions. [2021-07-13 18:25:58,814 INFO L78 Accepts]: Start accepts. Automaton has 89234 states and 240820 transitions. Word has length 394 [2021-07-13 18:25:58,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:58,814 INFO L482 AbstractCegarLoop]: Abstraction has 89234 states and 240820 transitions. [2021-07-13 18:25:58,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 17.64) internal successors, (441), 25 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:58,815 INFO L276 IsEmpty]: Start isEmpty. Operand 89234 states and 240820 transitions. [2021-07-13 18:25:58,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-07-13 18:25:58,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:58,976 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:25:59,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:59,177 INFO L430 AbstractCegarLoop]: === Iteration 80 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:59,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:59,177 INFO L82 PathProgramCache]: Analyzing trace with hash -279355365, now seen corresponding path program 27 times [2021-07-13 18:25:59,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:59,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245837557] [2021-07-13 18:25:59,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1348 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-13 18:25:59,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:59,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245837557] [2021-07-13 18:25:59,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245837557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:59,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881151395] [2021-07-13 18:25:59,373 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 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 18:26:00,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 18:26:00,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:00,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:00,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:26:00,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881151395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:00,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:00,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 22 [2021-07-13 18:26:00,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008497339] [2021-07-13 18:26:00,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:26:00,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:00,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:26:00,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:26:00,652 INFO L87 Difference]: Start difference. First operand 89234 states and 240820 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:01,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:01,591 INFO L93 Difference]: Finished difference Result 103444 states and 276915 transitions. [2021-07-13 18:26:01,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 18:26:01,591 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-07-13 18:26:01,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:01,920 INFO L225 Difference]: With dead ends: 103444 [2021-07-13 18:26:01,920 INFO L226 Difference]: Without dead ends: 103444 [2021-07-13 18:26:01,920 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 319.8ms TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:26:02,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103444 states. [2021-07-13 18:26:03,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103444 to 89914. [2021-07-13 18:26:04,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89914 states, 89912 states have (on average 2.699417207936649) internal successors, (242710), 89913 states have internal predecessors, (242710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:04,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89914 states to 89914 states and 242710 transitions. [2021-07-13 18:26:04,327 INFO L78 Accepts]: Start accepts. Automaton has 89914 states and 242710 transitions. Word has length 395 [2021-07-13 18:26:04,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:04,327 INFO L482 AbstractCegarLoop]: Abstraction has 89914 states and 242710 transitions. [2021-07-13 18:26:04,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:04,328 INFO L276 IsEmpty]: Start isEmpty. Operand 89914 states and 242710 transitions. [2021-07-13 18:26:04,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-07-13 18:26:04,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:04,500 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:04,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-13 18:26:04,701 INFO L430 AbstractCegarLoop]: === Iteration 81 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:04,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:04,702 INFO L82 PathProgramCache]: Analyzing trace with hash -673788487, now seen corresponding path program 28 times [2021-07-13 18:26:04,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:04,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58942334] [2021-07-13 18:26:04,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:26:04,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:04,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58942334] [2021-07-13 18:26:04,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58942334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:04,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317554709] [2021-07-13 18:26:04,888 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 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 18:26:05,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:26:05,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:05,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:05,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:26:06,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317554709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:06,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:06,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-13 18:26:06,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874137846] [2021-07-13 18:26:06,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:26:06,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:06,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:26:06,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:26:06,143 INFO L87 Difference]: Start difference. First operand 89914 states and 242710 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:07,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:07,074 INFO L93 Difference]: Finished difference Result 110429 states and 294732 transitions. [2021-07-13 18:26:07,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 18:26:07,074 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-07-13 18:26:07,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:07,345 INFO L225 Difference]: With dead ends: 110429 [2021-07-13 18:26:07,345 INFO L226 Difference]: Without dead ends: 110429 [2021-07-13 18:26:07,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 297.0ms TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:26:07,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110429 states. [2021-07-13 18:26:09,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110429 to 89914. [2021-07-13 18:26:09,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89914 states, 89912 states have (on average 2.699417207936649) internal successors, (242710), 89913 states have internal predecessors, (242710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89914 states to 89914 states and 242710 transitions. [2021-07-13 18:26:09,721 INFO L78 Accepts]: Start accepts. Automaton has 89914 states and 242710 transitions. Word has length 395 [2021-07-13 18:26:09,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:09,722 INFO L482 AbstractCegarLoop]: Abstraction has 89914 states and 242710 transitions. [2021-07-13 18:26:09,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:09,722 INFO L276 IsEmpty]: Start isEmpty. Operand 89914 states and 242710 transitions. [2021-07-13 18:26:09,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-07-13 18:26:09,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:09,876 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:10,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:10,078 INFO L430 AbstractCegarLoop]: === Iteration 82 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:10,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:10,078 INFO L82 PathProgramCache]: Analyzing trace with hash -331676969, now seen corresponding path program 29 times [2021-07-13 18:26:10,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:10,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800279723] [2021-07-13 18:26:10,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:26:10,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:10,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800279723] [2021-07-13 18:26:10,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800279723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:10,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100605437] [2021-07-13 18:26:10,269 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 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 18:26:11,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 18:26:11,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:11,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:11,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:26:11,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100605437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:11,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:11,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-13 18:26:11,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219522277] [2021-07-13 18:26:11,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:26:11,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:11,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:26:11,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:26:11,504 INFO L87 Difference]: Start difference. First operand 89914 states and 242710 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:12,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:12,419 INFO L93 Difference]: Finished difference Result 111689 states and 298642 transitions. [2021-07-13 18:26:12,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 18:26:12,419 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-07-13 18:26:12,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:12,675 INFO L225 Difference]: With dead ends: 111689 [2021-07-13 18:26:12,675 INFO L226 Difference]: Without dead ends: 111689 [2021-07-13 18:26:12,675 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 459.5ms TimeCoverageRelationStatistics Valid=531, Invalid=1275, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 18:26:12,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111689 states. [2021-07-13 18:26:14,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111689 to 88554. [2021-07-13 18:26:14,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88554 states, 88552 states have (on average 2.698188634926371) internal successors, (238930), 88553 states have internal predecessors, (238930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:15,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88554 states to 88554 states and 238930 transitions. [2021-07-13 18:26:15,036 INFO L78 Accepts]: Start accepts. Automaton has 88554 states and 238930 transitions. Word has length 395 [2021-07-13 18:26:15,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:15,037 INFO L482 AbstractCegarLoop]: Abstraction has 88554 states and 238930 transitions. [2021-07-13 18:26:15,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:15,037 INFO L276 IsEmpty]: Start isEmpty. Operand 88554 states and 238930 transitions. [2021-07-13 18:26:15,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-07-13 18:26:15,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:15,184 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:15,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:15,385 INFO L430 AbstractCegarLoop]: === Iteration 83 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:15,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:15,385 INFO L82 PathProgramCache]: Analyzing trace with hash -149954699, now seen corresponding path program 30 times [2021-07-13 18:26:15,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:15,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586314802] [2021-07-13 18:26:15,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:26:16,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:16,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586314802] [2021-07-13 18:26:16,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586314802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:16,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768016864] [2021-07-13 18:26:16,042 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 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 18:26:16,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 18:26:16,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:16,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:16,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:16,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:26:16,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768016864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:16,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:16,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-13 18:26:16,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134084213] [2021-07-13 18:26:16,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:26:16,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:16,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:26:16,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:26:16,937 INFO L87 Difference]: Start difference. First operand 88554 states and 238930 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:17,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:17,910 INFO L93 Difference]: Finished difference Result 117004 states and 312456 transitions. [2021-07-13 18:26:17,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 18:26:17,911 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-07-13 18:26:17,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:18,204 INFO L225 Difference]: With dead ends: 117004 [2021-07-13 18:26:18,204 INFO L226 Difference]: Without dead ends: 117004 [2021-07-13 18:26:18,205 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 760.8ms TimeCoverageRelationStatistics Valid=542, Invalid=1350, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 18:26:18,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117004 states. [2021-07-13 18:26:20,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117004 to 89814. [2021-07-13 18:26:20,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89814 states, 89812 states have (on average 2.6987373624905358) internal successors, (242379), 89813 states have internal predecessors, (242379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89814 states to 89814 states and 242379 transitions. [2021-07-13 18:26:20,572 INFO L78 Accepts]: Start accepts. Automaton has 89814 states and 242379 transitions. Word has length 395 [2021-07-13 18:26:20,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:20,573 INFO L482 AbstractCegarLoop]: Abstraction has 89814 states and 242379 transitions. [2021-07-13 18:26:20,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:20,573 INFO L276 IsEmpty]: Start isEmpty. Operand 89814 states and 242379 transitions. [2021-07-13 18:26:21,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-07-13 18:26:21,120 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:21,121 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:21,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:21,337 INFO L430 AbstractCegarLoop]: === Iteration 84 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:21,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:21,337 INFO L82 PathProgramCache]: Analyzing trace with hash 458703763, now seen corresponding path program 31 times [2021-07-13 18:26:21,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:21,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349089] [2021-07-13 18:26:21,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:26:21,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:21,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349089] [2021-07-13 18:26:21,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:21,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240617274] [2021-07-13 18:26:21,526 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 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 18:26:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:21,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:21,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:26:22,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240617274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:22,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:22,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-13 18:26:22,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230960517] [2021-07-13 18:26:22,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:26:22,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:22,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:26:22,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:26:22,102 INFO L87 Difference]: Start difference. First operand 89814 states and 242379 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:23,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:23,078 INFO L93 Difference]: Finished difference Result 119859 states and 319930 transitions. [2021-07-13 18:26:23,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 18:26:23,078 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-07-13 18:26:23,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:23,357 INFO L225 Difference]: With dead ends: 119859 [2021-07-13 18:26:23,357 INFO L226 Difference]: Without dead ends: 119859 [2021-07-13 18:26:23,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 495.3ms TimeCoverageRelationStatistics Valid=553, Invalid=1427, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 18:26:23,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119859 states. [2021-07-13 18:26:25,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119859 to 91754. [2021-07-13 18:26:25,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91754 states, 91752 states have (on average 2.6998648530822216) internal successors, (247718), 91753 states have internal predecessors, (247718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:26,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91754 states to 91754 states and 247718 transitions. [2021-07-13 18:26:26,023 INFO L78 Accepts]: Start accepts. Automaton has 91754 states and 247718 transitions. Word has length 395 [2021-07-13 18:26:26,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:26,023 INFO L482 AbstractCegarLoop]: Abstraction has 91754 states and 247718 transitions. [2021-07-13 18:26:26,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:26,024 INFO L276 IsEmpty]: Start isEmpty. Operand 91754 states and 247718 transitions. [2021-07-13 18:26:26,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-07-13 18:26:26,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:26,204 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:26,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:26,405 INFO L430 AbstractCegarLoop]: === Iteration 85 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:26,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:26,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1921716017, now seen corresponding path program 32 times [2021-07-13 18:26:26,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:26,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359705549] [2021-07-13 18:26:26,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:26:26,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:26,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359705549] [2021-07-13 18:26:26,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359705549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:26,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420675189] [2021-07-13 18:26:26,584 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 18:26:26,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:26:26,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:26,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:26,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:27,383 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:26:27,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:26:27,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420675189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:27,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:27,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-13 18:26:27,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903182425] [2021-07-13 18:26:27,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:26:27,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:27,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:26:27,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:26:27,409 INFO L87 Difference]: Start difference. First operand 91754 states and 247718 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:28,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:28,425 INFO L93 Difference]: Finished difference Result 120574 states and 321904 transitions. [2021-07-13 18:26:28,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 18:26:28,426 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-07-13 18:26:28,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:28,711 INFO L225 Difference]: With dead ends: 120574 [2021-07-13 18:26:28,711 INFO L226 Difference]: Without dead ends: 120574 [2021-07-13 18:26:28,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 320.4ms TimeCoverageRelationStatistics Valid=564, Invalid=1506, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 18:26:28,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120574 states. [2021-07-13 18:26:30,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120574 to 90494. [2021-07-13 18:26:30,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90494 states, 90492 states have (on average 2.6993435883835035) internal successors, (244269), 90493 states have internal predecessors, (244269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:31,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90494 states to 90494 states and 244269 transitions. [2021-07-13 18:26:31,205 INFO L78 Accepts]: Start accepts. Automaton has 90494 states and 244269 transitions. Word has length 395 [2021-07-13 18:26:31,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:31,205 INFO L482 AbstractCegarLoop]: Abstraction has 90494 states and 244269 transitions. [2021-07-13 18:26:31,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:31,205 INFO L276 IsEmpty]: Start isEmpty. Operand 90494 states and 244269 transitions. [2021-07-13 18:26:31,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-07-13 18:26:31,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:31,378 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:31,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:31,579 INFO L430 AbstractCegarLoop]: === Iteration 86 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:31,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:31,579 INFO L82 PathProgramCache]: Analyzing trace with hash 714941007, now seen corresponding path program 33 times [2021-07-13 18:26:31,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:31,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102942000] [2021-07-13 18:26:31,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:26:31,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:31,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102942000] [2021-07-13 18:26:31,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102942000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:31,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445455947] [2021-07-13 18:26:31,761 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 18:26:32,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 18:26:32,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:32,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:32,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:32,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:26:32,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445455947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:32,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:32,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-13 18:26:32,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100137680] [2021-07-13 18:26:32,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:26:32,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:32,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:26:32,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:26:32,943 INFO L87 Difference]: Start difference. First operand 90494 states and 244269 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:33,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:33,972 INFO L93 Difference]: Finished difference Result 116589 states and 311298 transitions. [2021-07-13 18:26:33,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 18:26:33,972 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-07-13 18:26:33,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:34,262 INFO L225 Difference]: With dead ends: 116589 [2021-07-13 18:26:34,262 INFO L226 Difference]: Without dead ends: 116589 [2021-07-13 18:26:34,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 356.1ms TimeCoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 18:26:34,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116589 states. [2021-07-13 18:26:36,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116589 to 90494. [2021-07-13 18:26:36,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90494 states, 90492 states have (on average 2.6993435883835035) internal successors, (244269), 90493 states have internal predecessors, (244269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:36,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90494 states to 90494 states and 244269 transitions. [2021-07-13 18:26:36,683 INFO L78 Accepts]: Start accepts. Automaton has 90494 states and 244269 transitions. Word has length 395 [2021-07-13 18:26:36,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:36,683 INFO L482 AbstractCegarLoop]: Abstraction has 90494 states and 244269 transitions. [2021-07-13 18:26:36,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:36,683 INFO L276 IsEmpty]: Start isEmpty. Operand 90494 states and 244269 transitions. [2021-07-13 18:26:36,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-07-13 18:26:36,849 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:36,850 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:37,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:37,050 INFO L430 AbstractCegarLoop]: === Iteration 87 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:37,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:37,051 INFO L82 PathProgramCache]: Analyzing trace with hash 603413741, now seen corresponding path program 34 times [2021-07-13 18:26:37,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:37,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697752238] [2021-07-13 18:26:37,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:37,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:26:37,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:37,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697752238] [2021-07-13 18:26:37,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697752238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:37,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654468199] [2021-07-13 18:26:37,697 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 18:26:38,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:26:38,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:38,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:38,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:38,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:26:38,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654468199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:38,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:38,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-13 18:26:38,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208044267] [2021-07-13 18:26:38,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:26:38,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:38,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:26:38,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:26:38,612 INFO L87 Difference]: Start difference. First operand 90494 states and 244269 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:39,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:39,613 INFO L93 Difference]: Finished difference Result 113179 states and 302510 transitions. [2021-07-13 18:26:39,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 18:26:39,614 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-07-13 18:26:39,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:39,900 INFO L225 Difference]: With dead ends: 113179 [2021-07-13 18:26:39,901 INFO L226 Difference]: Without dead ends: 113179 [2021-07-13 18:26:39,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 368.1ms TimeCoverageRelationStatistics Valid=586, Invalid=1670, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 18:26:40,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113179 states. [2021-07-13 18:26:41,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113179 to 88454. [2021-07-13 18:26:41,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88454 states, 88452 states have (on average 2.6974969474969477) internal successors, (238599), 88453 states have internal predecessors, (238599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:42,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88454 states to 88454 states and 238599 transitions. [2021-07-13 18:26:42,181 INFO L78 Accepts]: Start accepts. Automaton has 88454 states and 238599 transitions. Word has length 395 [2021-07-13 18:26:42,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:42,181 INFO L482 AbstractCegarLoop]: Abstraction has 88454 states and 238599 transitions. [2021-07-13 18:26:42,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:42,182 INFO L276 IsEmpty]: Start isEmpty. Operand 88454 states and 238599 transitions. [2021-07-13 18:26:42,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-13 18:26:42,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:42,347 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, 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 18:26:42,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-07-13 18:26:42,548 INFO L430 AbstractCegarLoop]: === Iteration 88 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:42,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:42,549 INFO L82 PathProgramCache]: Analyzing trace with hash 444637334, now seen corresponding path program 41 times [2021-07-13 18:26:42,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:42,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843641389] [2021-07-13 18:26:42,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-13 18:26:43,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:43,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843641389] [2021-07-13 18:26:43,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843641389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:43,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792835771] [2021-07-13 18:26:43,214 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 18:26:43,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 18:26:43,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:43,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:26:43,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:26:44,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792835771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:44,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:44,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-13 18:26:44,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638287185] [2021-07-13 18:26:44,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:26:44,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:44,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:26:44,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:26:44,012 INFO L87 Difference]: Start difference. First operand 88454 states and 238599 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:45,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:45,120 INFO L93 Difference]: Finished difference Result 129819 states and 347657 transitions. [2021-07-13 18:26:45,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:26:45,120 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-13 18:26:45,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:45,474 INFO L225 Difference]: With dead ends: 129819 [2021-07-13 18:26:45,474 INFO L226 Difference]: Without dead ends: 129819 [2021-07-13 18:26:45,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 252.4ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:26:45,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129819 states. [2021-07-13 18:26:47,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129819 to 91074. [2021-07-13 18:26:47,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91074 states, 91072 states have (on average 2.6992709065354883) internal successors, (245828), 91073 states have internal predecessors, (245828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:48,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91074 states to 91074 states and 245828 transitions. [2021-07-13 18:26:48,266 INFO L78 Accepts]: Start accepts. Automaton has 91074 states and 245828 transitions. Word has length 419 [2021-07-13 18:26:48,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:48,266 INFO L482 AbstractCegarLoop]: Abstraction has 91074 states and 245828 transitions. [2021-07-13 18:26:48,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:48,267 INFO L276 IsEmpty]: Start isEmpty. Operand 91074 states and 245828 transitions. [2021-07-13 18:26:48,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-13 18:26:48,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:48,427 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, 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 18:26:48,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:48,627 INFO L430 AbstractCegarLoop]: === Iteration 89 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:48,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:48,628 INFO L82 PathProgramCache]: Analyzing trace with hash 911742324, now seen corresponding path program 42 times [2021-07-13 18:26:48,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:48,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498860373] [2021-07-13 18:26:48,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-13 18:26:48,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:48,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498860373] [2021-07-13 18:26:48,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498860373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:48,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508642755] [2021-07-13 18:26:48,797 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 18:26:49,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 18:26:49,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:49,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:26:49,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:50,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:26:50,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508642755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:50,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:50,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-13 18:26:50,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988773705] [2021-07-13 18:26:50,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:26:50,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:50,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:26:50,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:26:50,052 INFO L87 Difference]: Start difference. First operand 91074 states and 245828 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:51,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:51,107 INFO L93 Difference]: Finished difference Result 156634 states and 420817 transitions. [2021-07-13 18:26:51,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:26:51,107 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-13 18:26:51,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:51,493 INFO L225 Difference]: With dead ends: 156634 [2021-07-13 18:26:51,493 INFO L226 Difference]: Without dead ends: 156634 [2021-07-13 18:26:51,493 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 222.7ms TimeCoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:26:51,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156634 states. [2021-07-13 18:26:53,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156634 to 93114. [2021-07-13 18:26:53,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93114 states, 93112 states have (on average 2.7010267205086347) internal successors, (251498), 93113 states have internal predecessors, (251498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:54,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93114 states to 93114 states and 251498 transitions. [2021-07-13 18:26:54,473 INFO L78 Accepts]: Start accepts. Automaton has 93114 states and 251498 transitions. Word has length 419 [2021-07-13 18:26:54,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:54,474 INFO L482 AbstractCegarLoop]: Abstraction has 93114 states and 251498 transitions. [2021-07-13 18:26:54,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:54,474 INFO L276 IsEmpty]: Start isEmpty. Operand 93114 states and 251498 transitions. [2021-07-13 18:26:54,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-13 18:26:54,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:54,647 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, 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 18:26:54,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-07-13 18:26:54,847 INFO L430 AbstractCegarLoop]: === Iteration 90 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:54,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:54,848 INFO L82 PathProgramCache]: Analyzing trace with hash 554776726, now seen corresponding path program 43 times [2021-07-13 18:26:54,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:54,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006301918] [2021-07-13 18:26:54,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:54,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:55,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-13 18:26:55,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:55,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006301918] [2021-07-13 18:26:55,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006301918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:55,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209966824] [2021-07-13 18:26:55,002 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 18:26:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:55,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:26:55,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:55,773 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:26:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:26:55,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209966824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:55,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:55,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-13 18:26:55,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102404002] [2021-07-13 18:26:55,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:26:55,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:55,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:26:55,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:26:55,876 INFO L87 Difference]: Start difference. First operand 93114 states and 251498 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:56,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:56,834 INFO L93 Difference]: Finished difference Result 132029 states and 353121 transitions. [2021-07-13 18:26:56,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:26:56,835 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-13 18:26:56,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:57,198 INFO L225 Difference]: With dead ends: 132029 [2021-07-13 18:26:57,198 INFO L226 Difference]: Without dead ends: 132029 [2021-07-13 18:26:57,198 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 222.0ms TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:26:57,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132029 states. [2021-07-13 18:26:59,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132029 to 94374. [2021-07-13 18:26:59,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94374 states, 94372 states have (on average 2.701511041410588) internal successors, (254947), 94373 states have internal predecessors, (254947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:59,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94374 states to 94374 states and 254947 transitions. [2021-07-13 18:26:59,926 INFO L78 Accepts]: Start accepts. Automaton has 94374 states and 254947 transitions. Word has length 419 [2021-07-13 18:26:59,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:59,926 INFO L482 AbstractCegarLoop]: Abstraction has 94374 states and 254947 transitions. [2021-07-13 18:26:59,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:59,927 INFO L276 IsEmpty]: Start isEmpty. Operand 94374 states and 254947 transitions. [2021-07-13 18:27:00,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-13 18:27:00,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:00,100 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, 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 18:27:00,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-13 18:27:00,301 INFO L430 AbstractCegarLoop]: === Iteration 91 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:00,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:00,301 INFO L82 PathProgramCache]: Analyzing trace with hash 55104210, now seen corresponding path program 44 times [2021-07-13 18:27:00,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:00,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452537048] [2021-07-13 18:27:00,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-13 18:27:00,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:00,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452537048] [2021-07-13 18:27:00,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452537048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:00,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110373163] [2021-07-13 18:27:00,944 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 18:27:01,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:27:01,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:27:01,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:27:01,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:01,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:27:01,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110373163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:01,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:01,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-13 18:27:01,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131483585] [2021-07-13 18:27:01,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:27:01,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:01,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:27:01,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:27:01,539 INFO L87 Difference]: Start difference. First operand 94374 states and 254947 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:02,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:02,513 INFO L93 Difference]: Finished difference Result 140364 states and 376050 transitions. [2021-07-13 18:27:02,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:27:02,513 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-13 18:27:02,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:02,855 INFO L225 Difference]: With dead ends: 140364 [2021-07-13 18:27:02,855 INFO L226 Difference]: Without dead ends: 140364 [2021-07-13 18:27:02,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 232.4ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:27:03,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140364 states. [2021-07-13 18:27:05,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140364 to 95734. [2021-07-13 18:27:05,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95734 states, 95732 states have (on average 2.7026177244808425) internal successors, (258727), 95733 states have internal predecessors, (258727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:05,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95734 states to 95734 states and 258727 transitions. [2021-07-13 18:27:05,710 INFO L78 Accepts]: Start accepts. Automaton has 95734 states and 258727 transitions. Word has length 419 [2021-07-13 18:27:05,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:05,710 INFO L482 AbstractCegarLoop]: Abstraction has 95734 states and 258727 transitions. [2021-07-13 18:27:05,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:05,711 INFO L276 IsEmpty]: Start isEmpty. Operand 95734 states and 258727 transitions. [2021-07-13 18:27:05,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-13 18:27:05,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:05,875 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, 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 18:27:06,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:27:06,076 INFO L430 AbstractCegarLoop]: === Iteration 92 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:06,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:06,076 INFO L82 PathProgramCache]: Analyzing trace with hash -301861388, now seen corresponding path program 45 times [2021-07-13 18:27:06,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:06,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997786882] [2021-07-13 18:27:06,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:06,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-13 18:27:06,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:06,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997786882] [2021-07-13 18:27:06,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997786882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:06,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015463374] [2021-07-13 18:27:06,241 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 18:27:06,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 18:27:06,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:27:06,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:27:06,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:07,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:27:07,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015463374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:07,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:07,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-13 18:27:07,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114719397] [2021-07-13 18:27:07,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:27:07,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:07,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:27:07,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:27:07,385 INFO L87 Difference]: Start difference. First operand 95734 states and 258727 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:08,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:08,365 INFO L93 Difference]: Finished difference Result 144764 states and 387949 transitions. [2021-07-13 18:27:08,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:27:08,365 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-13 18:27:08,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:08,710 INFO L225 Difference]: With dead ends: 144764 [2021-07-13 18:27:08,711 INFO L226 Difference]: Without dead ends: 144764 [2021-07-13 18:27:08,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=314, Invalid=946, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:27:08,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144764 states. [2021-07-13 18:27:10,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144764 to 95734. [2021-07-13 18:27:11,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95734 states, 95732 states have (on average 2.7026177244808425) internal successors, (258727), 95733 states have internal predecessors, (258727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:11,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95734 states to 95734 states and 258727 transitions. [2021-07-13 18:27:11,662 INFO L78 Accepts]: Start accepts. Automaton has 95734 states and 258727 transitions. Word has length 419 [2021-07-13 18:27:11,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:11,663 INFO L482 AbstractCegarLoop]: Abstraction has 95734 states and 258727 transitions. [2021-07-13 18:27:11,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:11,663 INFO L276 IsEmpty]: Start isEmpty. Operand 95734 states and 258727 transitions. [2021-07-13 18:27:11,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-13 18:27:11,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:11,841 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, 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 18:27:12,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:27:12,042 INFO L430 AbstractCegarLoop]: === Iteration 93 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:12,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:12,042 INFO L82 PathProgramCache]: Analyzing trace with hash 897306774, now seen corresponding path program 46 times [2021-07-13 18:27:12,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:12,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794303114] [2021-07-13 18:27:12,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-13 18:27:12,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:12,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794303114] [2021-07-13 18:27:12,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794303114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:12,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614306688] [2021-07-13 18:27:12,233 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 18:27:12,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:27:12,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:27:12,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:27:12,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:13,355 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:27:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:27:13,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614306688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:13,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:13,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-13 18:27:13,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639620496] [2021-07-13 18:27:13,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:27:13,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:13,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:27:13,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:27:13,546 INFO L87 Difference]: Start difference. First operand 95734 states and 258727 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:14,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:14,468 INFO L93 Difference]: Finished difference Result 124319 states and 331120 transitions. [2021-07-13 18:27:14,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:27:14,468 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-13 18:27:14,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:14,782 INFO L225 Difference]: With dead ends: 124319 [2021-07-13 18:27:14,783 INFO L226 Difference]: Without dead ends: 124319 [2021-07-13 18:27:14,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 228.5ms TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:27:14,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124319 states. [2021-07-13 18:27:16,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124319 to 91374. [2021-07-13 18:27:17,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91374 states, 91372 states have (on average 2.7008821083045134) internal successors, (246785), 91373 states have internal predecessors, (246785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:17,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91374 states to 91374 states and 246785 transitions. [2021-07-13 18:27:17,263 INFO L78 Accepts]: Start accepts. Automaton has 91374 states and 246785 transitions. Word has length 419 [2021-07-13 18:27:17,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:17,263 INFO L482 AbstractCegarLoop]: Abstraction has 91374 states and 246785 transitions. [2021-07-13 18:27:17,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:17,263 INFO L276 IsEmpty]: Start isEmpty. Operand 91374 states and 246785 transitions. [2021-07-13 18:27:17,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-13 18:27:17,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:17,428 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, 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 18:27:17,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:27:17,629 INFO L430 AbstractCegarLoop]: === Iteration 94 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:17,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:17,629 INFO L82 PathProgramCache]: Analyzing trace with hash -692238348, now seen corresponding path program 47 times [2021-07-13 18:27:17,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:17,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895645527] [2021-07-13 18:27:17,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:27:18,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:18,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895645527] [2021-07-13 18:27:18,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895645527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:18,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023324503] [2021-07-13 18:27:18,246 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 18:27:18,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 18:27:18,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:27:18,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:27:18,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:27:18,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023324503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:18,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:18,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:27:18,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331355381] [2021-07-13 18:27:18,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:27:18,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:18,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:27:18,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:27:18,975 INFO L87 Difference]: Start difference. First operand 91374 states and 246785 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:19,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:19,920 INFO L93 Difference]: Finished difference Result 136274 states and 365083 transitions. [2021-07-13 18:27:19,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:27:19,921 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-13 18:27:19,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:20,230 INFO L225 Difference]: With dead ends: 136274 [2021-07-13 18:27:20,230 INFO L226 Difference]: Without dead ends: 136274 [2021-07-13 18:27:20,231 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 252.9ms TimeCoverageRelationStatistics Valid=306, Invalid=954, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:27:20,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136274 states. [2021-07-13 18:27:22,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136274 to 92634. [2021-07-13 18:27:22,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92634 states, 92632 states have (on average 2.701377493738665) internal successors, (250234), 92633 states have internal predecessors, (250234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:23,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92634 states to 92634 states and 250234 transitions. [2021-07-13 18:27:23,052 INFO L78 Accepts]: Start accepts. Automaton has 92634 states and 250234 transitions. Word has length 419 [2021-07-13 18:27:23,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:23,052 INFO L482 AbstractCegarLoop]: Abstraction has 92634 states and 250234 transitions. [2021-07-13 18:27:23,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:23,052 INFO L276 IsEmpty]: Start isEmpty. Operand 92634 states and 250234 transitions. [2021-07-13 18:27:23,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-13 18:27:23,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:23,218 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, 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 18:27:23,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-07-13 18:27:23,421 INFO L430 AbstractCegarLoop]: === Iteration 95 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:23,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:23,421 INFO L82 PathProgramCache]: Analyzing trace with hash -225133358, now seen corresponding path program 48 times [2021-07-13 18:27:23,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:23,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654848940] [2021-07-13 18:27:23,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:27:23,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:23,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654848940] [2021-07-13 18:27:23,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654848940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:23,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822536957] [2021-07-13 18:27:23,564 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 18:27:23,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 18:27:23,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:27:23,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:27:23,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:27:24,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822536957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:24,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:24,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:27:24,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506629132] [2021-07-13 18:27:24,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:27:24,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:24,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:27:24,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:27:24,734 INFO L87 Difference]: Start difference. First operand 92634 states and 250234 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:25,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:25,848 INFO L93 Difference]: Finished difference Result 145904 states and 391249 transitions. [2021-07-13 18:27:25,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:27:25,849 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-13 18:27:25,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:26,461 INFO L225 Difference]: With dead ends: 145904 [2021-07-13 18:27:26,461 INFO L226 Difference]: Without dead ends: 145904 [2021-07-13 18:27:26,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:27:26,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145904 states. [2021-07-13 18:27:28,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145904 to 95734. [2021-07-13 18:27:28,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95734 states, 95732 states have (on average 2.7026177244808425) internal successors, (258727), 95733 states have internal predecessors, (258727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:29,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95734 states to 95734 states and 258727 transitions. [2021-07-13 18:27:29,337 INFO L78 Accepts]: Start accepts. Automaton has 95734 states and 258727 transitions. Word has length 419 [2021-07-13 18:27:29,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:29,337 INFO L482 AbstractCegarLoop]: Abstraction has 95734 states and 258727 transitions. [2021-07-13 18:27:29,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:29,338 INFO L276 IsEmpty]: Start isEmpty. Operand 95734 states and 258727 transitions. [2021-07-13 18:27:29,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-13 18:27:29,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:29,540 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, 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 18:27:29,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:27:29,740 INFO L430 AbstractCegarLoop]: === Iteration 96 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:29,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:29,741 INFO L82 PathProgramCache]: Analyzing trace with hash -582098956, now seen corresponding path program 49 times [2021-07-13 18:27:29,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:29,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494634309] [2021-07-13 18:27:29,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:27:29,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:29,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494634309] [2021-07-13 18:27:29,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494634309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:29,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319095204] [2021-07-13 18:27:29,878 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 18:27:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:30,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:27:30,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:30,673 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:27:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:27:30,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319095204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:30,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:30,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:27:30,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270058656] [2021-07-13 18:27:30,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:27:30,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:30,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:27:30,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:27:30,733 INFO L87 Difference]: Start difference. First operand 95734 states and 258727 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:31,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:31,438 INFO L93 Difference]: Finished difference Result 121809 states and 324362 transitions. [2021-07-13 18:27:31,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:27:31,438 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-13 18:27:31,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:31,945 INFO L225 Difference]: With dead ends: 121809 [2021-07-13 18:27:31,945 INFO L226 Difference]: Without dead ends: 121809 [2021-07-13 18:27:31,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:27:32,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121809 states. [2021-07-13 18:27:34,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121809 to 90114. [2021-07-13 18:27:34,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90114 states, 90112 states have (on average 2.7003728693181817) internal successors, (243336), 90113 states have internal predecessors, (243336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:34,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90114 states to 90114 states and 243336 transitions. [2021-07-13 18:27:34,417 INFO L78 Accepts]: Start accepts. Automaton has 90114 states and 243336 transitions. Word has length 419 [2021-07-13 18:27:34,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:34,417 INFO L482 AbstractCegarLoop]: Abstraction has 90114 states and 243336 transitions. [2021-07-13 18:27:34,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:34,418 INFO L276 IsEmpty]: Start isEmpty. Operand 90114 states and 243336 transitions. [2021-07-13 18:27:34,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-13 18:27:34,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:34,581 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, 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 18:27:34,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-07-13 18:27:34,782 INFO L430 AbstractCegarLoop]: === Iteration 97 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:34,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:34,782 INFO L82 PathProgramCache]: Analyzing trace with hash -67426606, now seen corresponding path program 50 times [2021-07-13 18:27:34,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:34,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136600025] [2021-07-13 18:27:34,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:27:34,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:34,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136600025] [2021-07-13 18:27:34,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136600025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:34,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902044139] [2021-07-13 18:27:34,926 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 18:27:35,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:27:35,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:27:35,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:27:35,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:27:35,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902044139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:35,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:35,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:27:35,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674038780] [2021-07-13 18:27:35,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:27:35,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:35,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:27:35,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:27:35,903 INFO L87 Difference]: Start difference. First operand 90114 states and 243336 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:36,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:36,855 INFO L93 Difference]: Finished difference Result 135089 states and 360890 transitions. [2021-07-13 18:27:36,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:27:36,856 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-13 18:27:36,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:37,167 INFO L225 Difference]: With dead ends: 135089 [2021-07-13 18:27:37,167 INFO L226 Difference]: Without dead ends: 135089 [2021-07-13 18:27:37,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 242.4ms TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:27:37,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135089 states. [2021-07-13 18:27:39,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135089 to 101354. [2021-07-13 18:27:39,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101354 states, 101352 states have (on average 2.7049688215328755) internal successors, (274154), 101353 states have internal predecessors, (274154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:40,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101354 states to 101354 states and 274154 transitions. [2021-07-13 18:27:40,253 INFO L78 Accepts]: Start accepts. Automaton has 101354 states and 274154 transitions. Word has length 419 [2021-07-13 18:27:40,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:40,254 INFO L482 AbstractCegarLoop]: Abstraction has 101354 states and 274154 transitions. [2021-07-13 18:27:40,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:40,254 INFO L276 IsEmpty]: Start isEmpty. Operand 101354 states and 274154 transitions. [2021-07-13 18:27:40,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-13 18:27:40,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:40,447 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, 2, 2, 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 18:27:40,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:27:40,648 INFO L430 AbstractCegarLoop]: === Iteration 98 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:40,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:40,652 INFO L82 PathProgramCache]: Analyzing trace with hash -946885319, now seen corresponding path program 51 times [2021-07-13 18:27:40,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:40,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567251766] [2021-07-13 18:27:40,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:40,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-13 18:27:40,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:40,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567251766] [2021-07-13 18:27:40,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567251766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:40,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231871654] [2021-07-13 18:27:40,840 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 18:27:41,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 18:27:41,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:27:41,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:27:41,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:27:42,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231871654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:42,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:42,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-13 18:27:42,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216364790] [2021-07-13 18:27:42,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:27:42,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:42,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:27:42,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:27:42,251 INFO L87 Difference]: Start difference. First operand 101354 states and 274154 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:43,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:43,241 INFO L93 Difference]: Finished difference Result 139589 states and 374175 transitions. [2021-07-13 18:27:43,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 18:27:43,241 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-13 18:27:43,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:43,570 INFO L225 Difference]: With dead ends: 139589 [2021-07-13 18:27:43,570 INFO L226 Difference]: Without dead ends: 139589 [2021-07-13 18:27:43,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 321.5ms TimeCoverageRelationStatistics Valid=496, Invalid=1484, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 18:27:44,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139589 states. [2021-07-13 18:27:46,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139589 to 102714. [2021-07-13 18:27:46,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102714 states, 102712 states have (on average 2.705954513591401) internal successors, (277934), 102713 states have internal predecessors, (277934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:46,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102714 states to 102714 states and 277934 transitions. [2021-07-13 18:27:46,523 INFO L78 Accepts]: Start accepts. Automaton has 102714 states and 277934 transitions. Word has length 424 [2021-07-13 18:27:46,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:46,523 INFO L482 AbstractCegarLoop]: Abstraction has 102714 states and 277934 transitions. [2021-07-13 18:27:46,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:46,523 INFO L276 IsEmpty]: Start isEmpty. Operand 102714 states and 277934 transitions. [2021-07-13 18:27:46,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-13 18:27:46,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:46,727 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, 2, 2, 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 18:27:46,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:27:46,928 INFO L430 AbstractCegarLoop]: === Iteration 99 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:46,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:46,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1303850917, now seen corresponding path program 52 times [2021-07-13 18:27:46,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:46,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785006814] [2021-07-13 18:27:46,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-13 18:27:47,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:47,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785006814] [2021-07-13 18:27:47,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785006814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:47,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722211677] [2021-07-13 18:27:47,114 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 18:27:47,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:27:47,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:27:47,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:27:47,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:27:48,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722211677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:48,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:48,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-13 18:27:48,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306949261] [2021-07-13 18:27:48,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:27:48,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:48,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:27:48,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:27:48,400 INFO L87 Difference]: Start difference. First operand 102714 states and 277934 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:49,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:49,414 INFO L93 Difference]: Finished difference Result 144454 states and 387269 transitions. [2021-07-13 18:27:49,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 18:27:49,415 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-13 18:27:49,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:49,766 INFO L225 Difference]: With dead ends: 144454 [2021-07-13 18:27:49,766 INFO L226 Difference]: Without dead ends: 144454 [2021-07-13 18:27:49,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 317.1ms TimeCoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 18:27:50,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144454 states. [2021-07-13 18:27:51,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144454 to 102034. [2021-07-13 18:27:52,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102034 states, 102032 states have (on average 2.7054649521718677) internal successors, (276044), 102033 states have internal predecessors, (276044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:52,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102034 states to 102034 states and 276044 transitions. [2021-07-13 18:27:52,767 INFO L78 Accepts]: Start accepts. Automaton has 102034 states and 276044 transitions. Word has length 424 [2021-07-13 18:27:52,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:52,768 INFO L482 AbstractCegarLoop]: Abstraction has 102034 states and 276044 transitions. [2021-07-13 18:27:52,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:52,768 INFO L276 IsEmpty]: Start isEmpty. Operand 102034 states and 276044 transitions. [2021-07-13 18:27:52,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-13 18:27:52,965 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:52,965 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, 2, 2, 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 18:27:53,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-07-13 18:27:53,168 INFO L430 AbstractCegarLoop]: === Iteration 100 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:53,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:53,168 INFO L82 PathProgramCache]: Analyzing trace with hash -104682755, now seen corresponding path program 53 times [2021-07-13 18:27:53,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:53,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853846651] [2021-07-13 18:27:53,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-13 18:27:53,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:53,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853846651] [2021-07-13 18:27:53,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853846651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:53,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908526239] [2021-07-13 18:27:53,354 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 18:27:53,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 18:27:53,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:27:53,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:27:53,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:54,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:27:54,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908526239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:54,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:54,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-13 18:27:54,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596492881] [2021-07-13 18:27:54,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:27:54,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:54,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:27:54,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:27:54,441 INFO L87 Difference]: Start difference. First operand 102034 states and 276044 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:55,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:55,475 INFO L93 Difference]: Finished difference Result 147569 states and 395715 transitions. [2021-07-13 18:27:55,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 18:27:55,476 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-13 18:27:55,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:55,830 INFO L225 Difference]: With dead ends: 147569 [2021-07-13 18:27:55,830 INFO L226 Difference]: Without dead ends: 147569 [2021-07-13 18:27:55,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 301.3ms TimeCoverageRelationStatistics Valid=474, Invalid=1332, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 18:27:56,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147569 states. [2021-07-13 18:27:58,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147569 to 102034. [2021-07-13 18:27:58,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102034 states, 102032 states have (on average 2.7054649521718677) internal successors, (276044), 102033 states have internal predecessors, (276044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:58,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102034 states to 102034 states and 276044 transitions. [2021-07-13 18:27:58,849 INFO L78 Accepts]: Start accepts. Automaton has 102034 states and 276044 transitions. Word has length 424 [2021-07-13 18:27:58,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:58,849 INFO L482 AbstractCegarLoop]: Abstraction has 102034 states and 276044 transitions. [2021-07-13 18:27:58,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:58,849 INFO L276 IsEmpty]: Start isEmpty. Operand 102034 states and 276044 transitions. [2021-07-13 18:27:59,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-13 18:27:59,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:59,052 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, 2, 2, 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 18:27:59,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-13 18:27:59,254 INFO L430 AbstractCegarLoop]: === Iteration 101 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:59,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:59,254 INFO L82 PathProgramCache]: Analyzing trace with hash -881894113, now seen corresponding path program 54 times [2021-07-13 18:27:59,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:59,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854927970] [2021-07-13 18:27:59,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:59,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-13 18:27:59,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:59,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854927970] [2021-07-13 18:27:59,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854927970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:59,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333813874] [2021-07-13 18:27:59,868 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 18:28:00,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 18:28:00,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:28:00,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:28:00,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:28:00,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:28:00,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333813874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:00,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:28:00,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-13 18:28:00,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262916970] [2021-07-13 18:28:00,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:28:00,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:00,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:28:00,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:28:00,889 INFO L87 Difference]: Start difference. First operand 102034 states and 276044 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:01,383 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-13 18:28:01,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:01,884 INFO L93 Difference]: Finished difference Result 143364 states and 384352 transitions. [2021-07-13 18:28:01,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 18:28:01,884 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-13 18:28:01,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:02,214 INFO L225 Difference]: With dead ends: 143364 [2021-07-13 18:28:02,214 INFO L226 Difference]: Without dead ends: 143364 [2021-07-13 18:28:02,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 862.8ms TimeCoverageRelationStatistics Valid=463, Invalid=1259, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:28:02,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143364 states. [2021-07-13 18:28:04,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143364 to 103974. [2021-07-13 18:28:05,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103974 states, 103972 states have (on average 2.706334397722464) internal successors, (281383), 103973 states have internal predecessors, (281383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:05,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103974 states to 103974 states and 281383 transitions. [2021-07-13 18:28:05,616 INFO L78 Accepts]: Start accepts. Automaton has 103974 states and 281383 transitions. Word has length 424 [2021-07-13 18:28:05,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:05,617 INFO L482 AbstractCegarLoop]: Abstraction has 103974 states and 281383 transitions. [2021-07-13 18:28:05,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:05,617 INFO L276 IsEmpty]: Start isEmpty. Operand 103974 states and 281383 transitions. [2021-07-13 18:28:05,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-13 18:28:05,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:05,893 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, 2, 2, 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 18:28:06,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:28:06,109 INFO L430 AbstractCegarLoop]: === Iteration 102 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:06,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:06,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1875310911, now seen corresponding path program 55 times [2021-07-13 18:28:06,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:06,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215455374] [2021-07-13 18:28:06,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-13 18:28:06,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:06,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215455374] [2021-07-13 18:28:06,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215455374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:06,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650886576] [2021-07-13 18:28:06,341 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 18:28:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:06,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:28:06,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:28:07,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:28:07,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650886576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:07,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:28:07,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-13 18:28:07,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631272032] [2021-07-13 18:28:07,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:28:07,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:07,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:28:07,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:28:07,365 INFO L87 Difference]: Start difference. First operand 103974 states and 281383 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:08,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:08,383 INFO L93 Difference]: Finished difference Result 144574 states and 387062 transitions. [2021-07-13 18:28:08,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:28:08,384 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-13 18:28:08,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:08,712 INFO L225 Difference]: With dead ends: 144574 [2021-07-13 18:28:08,712 INFO L226 Difference]: Without dead ends: 144574 [2021-07-13 18:28:08,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 302.7ms TimeCoverageRelationStatistics Valid=452, Invalid=1188, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:28:09,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144574 states. [2021-07-13 18:28:11,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144574 to 103974. [2021-07-13 18:28:11,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103974 states, 103972 states have (on average 2.706334397722464) internal successors, (281383), 103973 states have internal predecessors, (281383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:11,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103974 states to 103974 states and 281383 transitions. [2021-07-13 18:28:11,729 INFO L78 Accepts]: Start accepts. Automaton has 103974 states and 281383 transitions. Word has length 424 [2021-07-13 18:28:11,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:11,729 INFO L482 AbstractCegarLoop]: Abstraction has 103974 states and 281383 transitions. [2021-07-13 18:28:11,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:11,730 INFO L276 IsEmpty]: Start isEmpty. Operand 103974 states and 281383 transitions. [2021-07-13 18:28:11,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-13 18:28:11,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:11,933 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, 2, 2, 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 18:28:12,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-13 18:28:12,134 INFO L430 AbstractCegarLoop]: === Iteration 103 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:12,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:12,134 INFO L82 PathProgramCache]: Analyzing trace with hash 243386339, now seen corresponding path program 56 times [2021-07-13 18:28:12,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:12,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230301052] [2021-07-13 18:28:12,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:12,632 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:28:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-13 18:28:12,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:12,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230301052] [2021-07-13 18:28:12,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230301052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:12,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116031180] [2021-07-13 18:28:12,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:28:12,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:28:12,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:28:12,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:28:12,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:28:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:28:13,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116031180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:13,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:28:13,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-13 18:28:13,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518369095] [2021-07-13 18:28:13,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:28:13,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:13,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:28:13,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:28:13,358 INFO L87 Difference]: Start difference. First operand 103974 states and 281383 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:14,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:14,295 INFO L93 Difference]: Finished difference Result 132039 states and 352888 transitions. [2021-07-13 18:28:14,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:28:14,295 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-13 18:28:14,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:14,606 INFO L225 Difference]: With dead ends: 132039 [2021-07-13 18:28:14,606 INFO L226 Difference]: Without dead ends: 132039 [2021-07-13 18:28:14,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 848.0ms TimeCoverageRelationStatistics Valid=454, Invalid=1186, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:28:15,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132039 states. [2021-07-13 18:28:16,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132039 to 103974. [2021-07-13 18:28:17,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103974 states, 103972 states have (on average 2.706334397722464) internal successors, (281383), 103973 states have internal predecessors, (281383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:17,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103974 states to 103974 states and 281383 transitions. [2021-07-13 18:28:17,487 INFO L78 Accepts]: Start accepts. Automaton has 103974 states and 281383 transitions. Word has length 424 [2021-07-13 18:28:17,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:17,488 INFO L482 AbstractCegarLoop]: Abstraction has 103974 states and 281383 transitions. [2021-07-13 18:28:17,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:17,488 INFO L276 IsEmpty]: Start isEmpty. Operand 103974 states and 281383 transitions. [2021-07-13 18:28:17,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-13 18:28:17,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:17,708 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, 2, 2, 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 18:28:17,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-13 18:28:17,909 INFO L430 AbstractCegarLoop]: === Iteration 104 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:17,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:17,909 INFO L82 PathProgramCache]: Analyzing trace with hash -359993189, now seen corresponding path program 57 times [2021-07-13 18:28:17,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:17,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341533293] [2021-07-13 18:28:17,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:18,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:28:18,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:18,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341533293] [2021-07-13 18:28:18,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341533293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:18,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660846596] [2021-07-13 18:28:18,106 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 18:28:18,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 18:28:18,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:28:18,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:28:18,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:28:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:28:19,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660846596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:19,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:28:19,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:28:19,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018574919] [2021-07-13 18:28:19,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:28:19,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:19,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:28:19,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:28:19,451 INFO L87 Difference]: Start difference. First operand 103974 states and 281383 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:20,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:20,489 INFO L93 Difference]: Finished difference Result 153639 states and 411702 transitions. [2021-07-13 18:28:20,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 18:28:20,490 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-13 18:28:20,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:20,866 INFO L225 Difference]: With dead ends: 153639 [2021-07-13 18:28:20,866 INFO L226 Difference]: Without dead ends: 153639 [2021-07-13 18:28:20,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 309.8ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 18:28:21,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153639 states. [2021-07-13 18:28:23,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153639 to 104654. [2021-07-13 18:28:23,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104654 states, 104652 states have (on average 2.7068092344150134) internal successors, (283273), 104653 states have internal predecessors, (283273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:24,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104654 states to 104654 states and 283273 transitions. [2021-07-13 18:28:24,030 INFO L78 Accepts]: Start accepts. Automaton has 104654 states and 283273 transitions. Word has length 424 [2021-07-13 18:28:24,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:24,030 INFO L482 AbstractCegarLoop]: Abstraction has 104654 states and 283273 transitions. [2021-07-13 18:28:24,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:24,031 INFO L276 IsEmpty]: Start isEmpty. Operand 104654 states and 283273 transitions. [2021-07-13 18:28:24,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-13 18:28:24,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:24,699 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, 2, 2, 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 18:28:24,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-13 18:28:24,900 INFO L430 AbstractCegarLoop]: === Iteration 105 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:24,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:24,900 INFO L82 PathProgramCache]: Analyzing trace with hash -716958787, now seen corresponding path program 58 times [2021-07-13 18:28:24,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:24,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198043491] [2021-07-13 18:28:24,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:25,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:28:25,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:25,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198043491] [2021-07-13 18:28:25,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198043491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:25,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287737631] [2021-07-13 18:28:25,076 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 18:28:25,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:28:25,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:28:25,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:28:25,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:28:26,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:28:26,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287737631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:26,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:28:26,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:28:26,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27692717] [2021-07-13 18:28:26,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:28:26,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:26,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:28:26,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:28:26,012 INFO L87 Difference]: Start difference. First operand 104654 states and 283273 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:27,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:27,168 INFO L93 Difference]: Finished difference Result 160034 states and 429296 transitions. [2021-07-13 18:28:27,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 18:28:27,169 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-13 18:28:27,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:27,870 INFO L225 Difference]: With dead ends: 160034 [2021-07-13 18:28:27,871 INFO L226 Difference]: Without dead ends: 160034 [2021-07-13 18:28:27,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 301.2ms TimeCoverageRelationStatistics Valid=468, Invalid=1338, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 18:28:28,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160034 states. [2021-07-13 18:28:30,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160034 to 103974. [2021-07-13 18:28:30,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103974 states, 103972 states have (on average 2.706334397722464) internal successors, (281383), 103973 states have internal predecessors, (281383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:30,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103974 states to 103974 states and 281383 transitions. [2021-07-13 18:28:30,813 INFO L78 Accepts]: Start accepts. Automaton has 103974 states and 281383 transitions. Word has length 424 [2021-07-13 18:28:30,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:30,814 INFO L482 AbstractCegarLoop]: Abstraction has 103974 states and 281383 transitions. [2021-07-13 18:28:30,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:30,814 INFO L276 IsEmpty]: Start isEmpty. Operand 103974 states and 281383 transitions. [2021-07-13 18:28:31,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-13 18:28:31,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:31,511 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, 2, 2, 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 18:28:31,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:28:31,712 INFO L430 AbstractCegarLoop]: === Iteration 106 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:31,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:31,712 INFO L82 PathProgramCache]: Analyzing trace with hash 482209375, now seen corresponding path program 59 times [2021-07-13 18:28:31,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:31,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088883325] [2021-07-13 18:28:31,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:31,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:28:31,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:31,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088883325] [2021-07-13 18:28:31,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088883325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:31,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407953563] [2021-07-13 18:28:31,931 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 18:28:32,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 18:28:32,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:28:32,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:28:32,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:28:33,222 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:28:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:28:33,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407953563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:33,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:28:33,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:28:33,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222030030] [2021-07-13 18:28:33,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:28:33,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:33,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:28:33,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:28:33,269 INFO L87 Difference]: Start difference. First operand 103974 states and 281383 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:34,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:34,531 INFO L93 Difference]: Finished difference Result 162759 states and 436942 transitions. [2021-07-13 18:28:34,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 18:28:34,532 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-13 18:28:34,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:35,030 INFO L225 Difference]: With dead ends: 162759 [2021-07-13 18:28:35,030 INFO L226 Difference]: Without dead ends: 162759 [2021-07-13 18:28:35,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=458, Invalid=1264, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:28:35,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162759 states. [2021-07-13 18:28:37,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162759 to 102034. [2021-07-13 18:28:37,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102034 states, 102032 states have (on average 2.7054649521718677) internal successors, (276044), 102033 states have internal predecessors, (276044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:38,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102034 states to 102034 states and 276044 transitions. [2021-07-13 18:28:38,292 INFO L78 Accepts]: Start accepts. Automaton has 102034 states and 276044 transitions. Word has length 424 [2021-07-13 18:28:38,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:38,293 INFO L482 AbstractCegarLoop]: Abstraction has 102034 states and 276044 transitions. [2021-07-13 18:28:38,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:38,293 INFO L276 IsEmpty]: Start isEmpty. Operand 102034 states and 276044 transitions. [2021-07-13 18:28:38,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-13 18:28:38,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:38,506 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, 2, 2, 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 18:28:38,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-07-13 18:28:38,707 INFO L430 AbstractCegarLoop]: === Iteration 107 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:38,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:38,707 INFO L82 PathProgramCache]: Analyzing trace with hash -295001983, now seen corresponding path program 60 times [2021-07-13 18:28:38,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:38,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559544095] [2021-07-13 18:28:38,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:28:38,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:38,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559544095] [2021-07-13 18:28:38,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559544095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:38,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274003120] [2021-07-13 18:28:38,910 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 18:28:39,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 18:28:39,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:28:39,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:28:39,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:28:39,852 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:28:40,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:28:40,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274003120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:40,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:28:40,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:28:40,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587045999] [2021-07-13 18:28:40,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:28:40,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:40,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:28:40,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:28:40,267 INFO L87 Difference]: Start difference. First operand 102034 states and 276044 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:41,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:41,529 INFO L93 Difference]: Finished difference Result 159244 states and 427729 transitions. [2021-07-13 18:28:41,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:28:41,529 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-13 18:28:41,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:42,136 INFO L225 Difference]: With dead ends: 159244 [2021-07-13 18:28:42,137 INFO L226 Difference]: Without dead ends: 159244 [2021-07-13 18:28:42,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 281.5ms TimeCoverageRelationStatistics Valid=448, Invalid=1192, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:28:42,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159244 states. [2021-07-13 18:28:44,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159244 to 103294. [2021-07-13 18:28:45,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103294 states, 103292 states have (on average 2.705853309065562) internal successors, (279493), 103293 states have internal predecessors, (279493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:45,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103294 states to 103294 states and 279493 transitions. [2021-07-13 18:28:45,508 INFO L78 Accepts]: Start accepts. Automaton has 103294 states and 279493 transitions. Word has length 424 [2021-07-13 18:28:45,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:45,509 INFO L482 AbstractCegarLoop]: Abstraction has 103294 states and 279493 transitions. [2021-07-13 18:28:45,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:45,509 INFO L276 IsEmpty]: Start isEmpty. Operand 103294 states and 279493 transitions. [2021-07-13 18:28:45,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-13 18:28:45,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:45,715 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, 2, 2, 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 18:28:45,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-13 18:28:45,916 INFO L430 AbstractCegarLoop]: === Iteration 108 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:45,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:45,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1288418781, now seen corresponding path program 61 times [2021-07-13 18:28:45,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:45,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509208245] [2021-07-13 18:28:45,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:28:46,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:46,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509208245] [2021-07-13 18:28:46,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509208245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:46,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626680506] [2021-07-13 18:28:46,088 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 18:28:46,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:46,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:28:46,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:28:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:28:47,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626680506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:47,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:28:47,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:28:47,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846472077] [2021-07-13 18:28:47,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:28:47,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:47,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:28:47,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:28:47,067 INFO L87 Difference]: Start difference. First operand 103294 states and 279493 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:48,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:48,049 INFO L93 Difference]: Finished difference Result 134784 states and 359855 transitions. [2021-07-13 18:28:48,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:28:48,049 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-13 18:28:48,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:48,416 INFO L225 Difference]: With dead ends: 134784 [2021-07-13 18:28:48,416 INFO L226 Difference]: Without dead ends: 134784 [2021-07-13 18:28:48,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 278.0ms TimeCoverageRelationStatistics Valid=450, Invalid=1190, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:28:48,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134784 states. [2021-07-13 18:28:50,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134784 to 98054. [2021-07-13 18:28:50,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98054 states, 98052 states have (on average 2.7030045282095214) internal successors, (265035), 98053 states have internal predecessors, (265035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:51,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98054 states to 98054 states and 265035 transitions. [2021-07-13 18:28:51,455 INFO L78 Accepts]: Start accepts. Automaton has 98054 states and 265035 transitions. Word has length 424 [2021-07-13 18:28:51,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:51,455 INFO L482 AbstractCegarLoop]: Abstraction has 98054 states and 265035 transitions. [2021-07-13 18:28:51,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:51,456 INFO L276 IsEmpty]: Start isEmpty. Operand 98054 states and 265035 transitions. [2021-07-13 18:28:51,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-13 18:28:51,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:51,639 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, 2, 2, 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 18:28:51,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-13 18:28:51,840 INFO L430 AbstractCegarLoop]: === Iteration 109 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:51,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:51,840 INFO L82 PathProgramCache]: Analyzing trace with hash -769938307, now seen corresponding path program 62 times [2021-07-13 18:28:51,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:51,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677354326] [2021-07-13 18:28:51,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:51,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:28:52,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:52,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677354326] [2021-07-13 18:28:52,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677354326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:52,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876990115] [2021-07-13 18:28:52,039 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 18:28:52,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:28:52,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:28:52,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:28:52,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:28:52,713 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:28:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:28:52,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876990115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:52,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:28:52,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:28:52,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973984231] [2021-07-13 18:28:52,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:28:52,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:52,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:28:52,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:28:52,993 INFO L87 Difference]: Start difference. First operand 98054 states and 265035 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:54,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:54,166 INFO L93 Difference]: Finished difference Result 164019 states and 440596 transitions. [2021-07-13 18:28:54,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 18:28:54,167 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-13 18:28:54,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:54,597 INFO L225 Difference]: With dead ends: 164019 [2021-07-13 18:28:54,597 INFO L226 Difference]: Without dead ends: 164019 [2021-07-13 18:28:54,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 313.9ms TimeCoverageRelationStatistics Valid=479, Invalid=1413, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 18:28:55,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164019 states. [2021-07-13 18:28:57,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164019 to 103974. [2021-07-13 18:28:57,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103974 states, 103972 states have (on average 2.706334397722464) internal successors, (281383), 103973 states have internal predecessors, (281383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:57,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103974 states to 103974 states and 281383 transitions. [2021-07-13 18:28:57,988 INFO L78 Accepts]: Start accepts. Automaton has 103974 states and 281383 transitions. Word has length 424 [2021-07-13 18:28:57,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:57,988 INFO L482 AbstractCegarLoop]: Abstraction has 103974 states and 281383 transitions. [2021-07-13 18:28:57,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:57,989 INFO L276 IsEmpty]: Start isEmpty. Operand 103974 states and 281383 transitions. [2021-07-13 18:28:58,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-13 18:28:58,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:58,683 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, 2, 2, 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 18:28:58,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:28:58,883 INFO L430 AbstractCegarLoop]: === Iteration 110 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:58,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:58,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1126903905, now seen corresponding path program 63 times [2021-07-13 18:28:58,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:58,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43827480] [2021-07-13 18:28:58,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:58,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:28:59,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:59,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43827480] [2021-07-13 18:28:59,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43827480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:59,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956799238] [2021-07-13 18:28:59,053 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 18:28:59,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 18:28:59,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:28:59,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:28:59,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:29:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:29:00,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956799238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:00,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:29:00,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:29:00,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592223876] [2021-07-13 18:29:00,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:29:00,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:29:00,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:29:00,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:29:00,024 INFO L87 Difference]: Start difference. First operand 103974 states and 281383 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:01,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:29:01,219 INFO L93 Difference]: Finished difference Result 175214 states and 471458 transitions. [2021-07-13 18:29:01,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 18:29:01,220 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-13 18:29:01,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:29:01,978 INFO L225 Difference]: With dead ends: 175214 [2021-07-13 18:29:01,978 INFO L226 Difference]: Without dead ends: 175214 [2021-07-13 18:29:01,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 295.9ms TimeCoverageRelationStatistics Valid=469, Invalid=1337, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 18:29:02,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175214 states. [2021-07-13 18:29:04,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175214 to 103294. [2021-07-13 18:29:04,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103294 states, 103292 states have (on average 2.705853309065562) internal successors, (279493), 103293 states have internal predecessors, (279493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:05,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103294 states to 103294 states and 279493 transitions. [2021-07-13 18:29:05,455 INFO L78 Accepts]: Start accepts. Automaton has 103294 states and 279493 transitions. Word has length 424 [2021-07-13 18:29:05,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:29:05,455 INFO L482 AbstractCegarLoop]: Abstraction has 103294 states and 279493 transitions. [2021-07-13 18:29:05,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:05,455 INFO L276 IsEmpty]: Start isEmpty. Operand 103294 states and 279493 transitions. [2021-07-13 18:29:05,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-13 18:29:05,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:29:05,684 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, 2, 2, 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 18:29:05,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:29:05,885 INFO L430 AbstractCegarLoop]: === Iteration 111 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:29:05,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:29:05,885 INFO L82 PathProgramCache]: Analyzing trace with hash 72264257, now seen corresponding path program 64 times [2021-07-13 18:29:05,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:29:05,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116823944] [2021-07-13 18:29:05,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:29:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:29:06,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:29:06,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116823944] [2021-07-13 18:29:06,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116823944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:06,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939237143] [2021-07-13 18:29:06,063 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 18:29:06,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:29:06,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:29:06,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:29:06,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:29:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:29:07,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939237143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:07,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:29:07,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:29:07,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856863283] [2021-07-13 18:29:07,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:29:07,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:29:07,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:29:07,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:29:07,317 INFO L87 Difference]: Start difference. First operand 103294 states and 279493 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:08,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:29:08,477 INFO L93 Difference]: Finished difference Result 174659 states and 470136 transitions. [2021-07-13 18:29:08,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 18:29:08,478 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-13 18:29:08,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:29:08,911 INFO L225 Difference]: With dead ends: 174659 [2021-07-13 18:29:08,911 INFO L226 Difference]: Without dead ends: 174659 [2021-07-13 18:29:08,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 289.8ms TimeCoverageRelationStatistics Valid=459, Invalid=1263, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:29:09,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174659 states. [2021-07-13 18:29:11,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174659 to 105814. [2021-07-13 18:29:11,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105814 states, 105812 states have (on average 2.7066022757343213) internal successors, (286391), 105813 states have internal predecessors, (286391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:12,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105814 states to 105814 states and 286391 transitions. [2021-07-13 18:29:12,317 INFO L78 Accepts]: Start accepts. Automaton has 105814 states and 286391 transitions. Word has length 424 [2021-07-13 18:29:12,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:29:12,318 INFO L482 AbstractCegarLoop]: Abstraction has 105814 states and 286391 transitions. [2021-07-13 18:29:12,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:12,318 INFO L276 IsEmpty]: Start isEmpty. Operand 105814 states and 286391 transitions. [2021-07-13 18:29:13,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-13 18:29:13,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:29:13,031 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, 2, 2, 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 18:29:13,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:29:13,231 INFO L430 AbstractCegarLoop]: === Iteration 112 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:29:13,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:29:13,232 INFO L82 PathProgramCache]: Analyzing trace with hash -704947101, now seen corresponding path program 65 times [2021-07-13 18:29:13,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:29:13,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087480706] [2021-07-13 18:29:13,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:29:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:29:13,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:29:13,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087480706] [2021-07-13 18:29:13,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087480706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:13,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156937427] [2021-07-13 18:29:13,404 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 18:29:13,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 18:29:13,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:29:13,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:29:13,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:29:14,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:29:14,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156937427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:14,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:29:14,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:29:14,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093087117] [2021-07-13 18:29:14,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:29:14,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:29:14,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:29:14,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:29:14,141 INFO L87 Difference]: Start difference. First operand 105814 states and 286391 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:15,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:29:15,517 INFO L93 Difference]: Finished difference Result 141204 states and 378336 transitions. [2021-07-13 18:29:15,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 18:29:15,517 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-13 18:29:15,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:29:15,900 INFO L225 Difference]: With dead ends: 141204 [2021-07-13 18:29:15,901 INFO L226 Difference]: Without dead ends: 141204 [2021-07-13 18:29:15,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 290.4ms TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:29:16,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141204 states. [2021-07-13 18:29:18,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141204 to 104354. [2021-07-13 18:29:18,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104354 states, 104352 states have (on average 2.705420116528672) internal successors, (282316), 104353 states have internal predecessors, (282316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:19,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104354 states to 104354 states and 282316 transitions. [2021-07-13 18:29:19,141 INFO L78 Accepts]: Start accepts. Automaton has 104354 states and 282316 transitions. Word has length 424 [2021-07-13 18:29:19,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:29:19,142 INFO L482 AbstractCegarLoop]: Abstraction has 104354 states and 282316 transitions. [2021-07-13 18:29:19,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:19,142 INFO L276 IsEmpty]: Start isEmpty. Operand 104354 states and 282316 transitions. [2021-07-13 18:29:19,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-13 18:29:19,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:29:19,378 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, 2, 2, 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 18:29:19,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-07-13 18:29:19,579 INFO L430 AbstractCegarLoop]: === Iteration 113 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:29:19,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:29:19,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1724383455, now seen corresponding path program 66 times [2021-07-13 18:29:19,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:29:19,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681275005] [2021-07-13 18:29:19,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:29:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:29:19,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:29:19,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681275005] [2021-07-13 18:29:19,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681275005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:19,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841561566] [2021-07-13 18:29:19,751 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 18:29:20,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 18:29:20,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:29:20,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:29:20,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:29:20,938 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:29:21,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:29:21,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841561566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:21,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:29:21,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:29:21,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499812452] [2021-07-13 18:29:21,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:29:21,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:29:21,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:29:21,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:29:21,057 INFO L87 Difference]: Start difference. First operand 104354 states and 282316 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:22,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:29:22,497 INFO L93 Difference]: Finished difference Result 183049 states and 492560 transitions. [2021-07-13 18:29:22,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 18:29:22,498 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-13 18:29:22,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:29:23,330 INFO L225 Difference]: With dead ends: 183049 [2021-07-13 18:29:23,330 INFO L226 Difference]: Without dead ends: 183049 [2021-07-13 18:29:23,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 307.1ms TimeCoverageRelationStatistics Valid=480, Invalid=1412, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 18:29:23,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183049 states. [2021-07-13 18:29:26,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183049 to 110274. [2021-07-13 18:29:26,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110274 states, 110272 states have (on average 2.708430063842136) internal successors, (298664), 110273 states have internal predecessors, (298664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:26,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110274 states to 110274 states and 298664 transitions. [2021-07-13 18:29:26,953 INFO L78 Accepts]: Start accepts. Automaton has 110274 states and 298664 transitions. Word has length 424 [2021-07-13 18:29:26,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:29:26,954 INFO L482 AbstractCegarLoop]: Abstraction has 110274 states and 298664 transitions. [2021-07-13 18:29:26,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:26,954 INFO L276 IsEmpty]: Start isEmpty. Operand 110274 states and 298664 transitions. [2021-07-13 18:29:27,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-13 18:29:27,171 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:29:27,172 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, 2, 2, 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 18:29:27,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-13 18:29:27,372 INFO L430 AbstractCegarLoop]: === Iteration 114 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:29:27,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:29:27,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1367417857, now seen corresponding path program 67 times [2021-07-13 18:29:27,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:29:27,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84096566] [2021-07-13 18:29:27,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:29:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:29:27,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:29:27,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84096566] [2021-07-13 18:29:27,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84096566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:27,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511182832] [2021-07-13 18:29:27,578 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 18:29:28,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:28,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:29:28,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:29:28,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:29:28,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511182832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:28,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:29:28,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:29:28,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724325686] [2021-07-13 18:29:28,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:29:28,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:29:28,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:29:28,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:29:28,581 INFO L87 Difference]: Start difference. First operand 110274 states and 298664 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:29,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:29:29,793 INFO L93 Difference]: Finished difference Result 191414 states and 515964 transitions. [2021-07-13 18:29:29,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 18:29:29,794 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-13 18:29:29,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:29:30,634 INFO L225 Difference]: With dead ends: 191414 [2021-07-13 18:29:30,634 INFO L226 Difference]: Without dead ends: 191414 [2021-07-13 18:29:30,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 304.5ms TimeCoverageRelationStatistics Valid=470, Invalid=1336, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 18:29:30,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191414 states. [2021-07-13 18:29:33,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191414 to 110854. [2021-07-13 18:29:33,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110854 states, 110852 states have (on average 2.7083228087900983) internal successors, (300223), 110853 states have internal predecessors, (300223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:34,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110854 states to 110854 states and 300223 transitions. [2021-07-13 18:29:34,218 INFO L78 Accepts]: Start accepts. Automaton has 110854 states and 300223 transitions. Word has length 424 [2021-07-13 18:29:34,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:29:34,218 INFO L482 AbstractCegarLoop]: Abstraction has 110854 states and 300223 transitions. [2021-07-13 18:29:34,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:34,218 INFO L276 IsEmpty]: Start isEmpty. Operand 110854 states and 300223 transitions. [2021-07-13 18:29:34,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-13 18:29:34,440 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:29:34,440 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, 2, 2, 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 18:29:34,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-13 18:29:34,641 INFO L430 AbstractCegarLoop]: === Iteration 115 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:29:34,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:29:34,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1728381277, now seen corresponding path program 68 times [2021-07-13 18:29:34,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:29:34,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726132791] [2021-07-13 18:29:34,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:29:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:29:34,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:29:34,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726132791] [2021-07-13 18:29:34,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726132791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:34,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078537502] [2021-07-13 18:29:34,832 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 18:29:35,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:29:35,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:29:35,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:29:35,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:29:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:29:35,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078537502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:35,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:29:35,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:29:35,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621306828] [2021-07-13 18:29:35,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:29:35,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:29:35,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:29:35,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:29:35,839 INFO L87 Difference]: Start difference. First operand 110854 states and 300223 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:36,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:29:36,881 INFO L93 Difference]: Finished difference Result 147009 states and 394083 transitions. [2021-07-13 18:29:36,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 18:29:36,882 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-13 18:29:36,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:29:37,271 INFO L225 Difference]: With dead ends: 147009 [2021-07-13 18:29:37,271 INFO L226 Difference]: Without dead ends: 147009 [2021-07-13 18:29:37,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 292.0ms TimeCoverageRelationStatistics Valid=472, Invalid=1334, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 18:29:37,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147009 states. [2021-07-13 18:29:40,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147009 to 109394. [2021-07-13 18:29:40,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109394 states, 109392 states have (on average 2.707218078104432) internal successors, (296148), 109393 states have internal predecessors, (296148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:40,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109394 states to 109394 states and 296148 transitions. [2021-07-13 18:29:40,552 INFO L78 Accepts]: Start accepts. Automaton has 109394 states and 296148 transitions. Word has length 424 [2021-07-13 18:29:40,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:29:40,552 INFO L482 AbstractCegarLoop]: Abstraction has 109394 states and 296148 transitions. [2021-07-13 18:29:40,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:40,553 INFO L276 IsEmpty]: Start isEmpty. Operand 109394 states and 296148 transitions. [2021-07-13 18:29:40,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-13 18:29:40,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:29:40,799 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, 2, 2, 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 18:29:40,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-13 18:29:41,000 INFO L430 AbstractCegarLoop]: === Iteration 116 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:29:41,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:29:41,489 INFO L82 PathProgramCache]: Analyzing trace with hash -56750655, now seen corresponding path program 69 times [2021-07-13 18:29:41,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:29:41,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343740227] [2021-07-13 18:29:41,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:29:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:29:41,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:29:41,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343740227] [2021-07-13 18:29:41,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343740227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:41,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906796483] [2021-07-13 18:29:41,741 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 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 18:29:42,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 18:29:42,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:29:42,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:29:42,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:29:42,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:29:42,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906796483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:42,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:29:42,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:29:42,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101097127] [2021-07-13 18:29:42,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:29:42,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:29:42,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:29:42,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:29:42,674 INFO L87 Difference]: Start difference. First operand 109394 states and 296148 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:44,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:29:44,217 INFO L93 Difference]: Finished difference Result 190559 states and 513309 transitions. [2021-07-13 18:29:44,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 18:29:44,218 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-13 18:29:44,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:29:44,749 INFO L225 Difference]: With dead ends: 190559 [2021-07-13 18:29:44,750 INFO L226 Difference]: Without dead ends: 190559 [2021-07-13 18:29:44,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 439.5ms TimeCoverageRelationStatistics Valid=481, Invalid=1411, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 18:29:45,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190559 states. [2021-07-13 18:29:47,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190559 to 112014. [2021-07-13 18:29:48,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112014 states, 112012 states have (on average 2.708433025033032) internal successors, (303377), 112013 states have internal predecessors, (303377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:48,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112014 states to 112014 states and 303377 transitions. [2021-07-13 18:29:48,370 INFO L78 Accepts]: Start accepts. Automaton has 112014 states and 303377 transitions. Word has length 424 [2021-07-13 18:29:48,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:29:48,371 INFO L482 AbstractCegarLoop]: Abstraction has 112014 states and 303377 transitions. [2021-07-13 18:29:48,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:48,371 INFO L276 IsEmpty]: Start isEmpty. Operand 112014 states and 303377 transitions. [2021-07-13 18:29:49,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-13 18:29:49,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:29:49,125 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, 2, 2, 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 18:29:49,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-07-13 18:29:49,328 INFO L430 AbstractCegarLoop]: === Iteration 117 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:29:49,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:29:49,328 INFO L82 PathProgramCache]: Analyzing trace with hash -413716253, now seen corresponding path program 70 times [2021-07-13 18:29:49,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:29:49,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594268331] [2021-07-13 18:29:49,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:29:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:49,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:29:49,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:29:49,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594268331] [2021-07-13 18:29:49,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594268331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:49,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81359511] [2021-07-13 18:29:49,493 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 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 18:29:49,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:29:49,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:29:49,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:29:49,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:29:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:29:50,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81359511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:50,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:29:50,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:29:50,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208504400] [2021-07-13 18:29:50,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:29:50,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:29:50,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:29:50,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:29:50,180 INFO L87 Difference]: Start difference. First operand 112014 states and 303377 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:51,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:29:51,332 INFO L93 Difference]: Finished difference Result 146514 states and 392810 transitions. [2021-07-13 18:29:51,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 18:29:51,333 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-13 18:29:51,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:29:51,994 INFO L225 Difference]: With dead ends: 146514 [2021-07-13 18:29:51,994 INFO L226 Difference]: Without dead ends: 146514 [2021-07-13 18:29:51,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 297.2ms TimeCoverageRelationStatistics Valid=483, Invalid=1409, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 18:29:52,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146514 states. [2021-07-13 18:29:54,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146514 to 113274. [2021-07-13 18:29:54,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113274 states, 113272 states have (on average 2.7087541493043292) internal successors, (306826), 113273 states have internal predecessors, (306826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:55,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113274 states to 113274 states and 306826 transitions. [2021-07-13 18:29:55,366 INFO L78 Accepts]: Start accepts. Automaton has 113274 states and 306826 transitions. Word has length 424 [2021-07-13 18:29:55,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:29:55,366 INFO L482 AbstractCegarLoop]: Abstraction has 113274 states and 306826 transitions. [2021-07-13 18:29:55,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:55,367 INFO L276 IsEmpty]: Start isEmpty. Operand 113274 states and 306826 transitions. [2021-07-13 18:29:55,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-13 18:29:55,605 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:29:55,605 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, 2, 2, 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 18:29:55,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:29:55,807 INFO L430 AbstractCegarLoop]: === Iteration 118 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:29:55,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:29:55,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1254886621, now seen corresponding path program 71 times [2021-07-13 18:29:55,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:29:55,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409798621] [2021-07-13 18:29:55,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:29:55,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:29:55,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:29:55,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409798621] [2021-07-13 18:29:55,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409798621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:55,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195736412] [2021-07-13 18:29:55,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:29:56,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 18:29:56,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:29:56,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:29:56,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:29:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-13 18:29:57,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195736412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:57,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:29:57,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:29:57,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131988390] [2021-07-13 18:29:57,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:29:57,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:29:57,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:29:57,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:29:57,113 INFO L87 Difference]: Start difference. First operand 113274 states and 306826 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:58,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:29:58,195 INFO L93 Difference]: Finished difference Result 144324 states and 386976 transitions. [2021-07-13 18:29:58,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 18:29:58,196 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-13 18:29:58,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:29:58,566 INFO L225 Difference]: With dead ends: 144324 [2021-07-13 18:29:58,566 INFO L226 Difference]: Without dead ends: 144324 [2021-07-13 18:29:58,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 314.3ms TimeCoverageRelationStatistics Valid=494, Invalid=1486, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 18:29:58,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144324 states. [2021-07-13 18:30:01,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144324 to 115214. [2021-07-13 18:30:01,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115214 states, 115212 states have (on average 2.709483387147172) internal successors, (312165), 115213 states have internal predecessors, (312165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:02,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115214 states to 115214 states and 312165 transitions. [2021-07-13 18:30:02,602 INFO L78 Accepts]: Start accepts. Automaton has 115214 states and 312165 transitions. Word has length 424 [2021-07-13 18:30:02,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:30:02,602 INFO L482 AbstractCegarLoop]: Abstraction has 115214 states and 312165 transitions. [2021-07-13 18:30:02,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:02,602 INFO L276 IsEmpty]: Start isEmpty. Operand 115214 states and 312165 transitions. [2021-07-13 18:30:02,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2021-07-13 18:30:02,920 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:30:02,921 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:30:03,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-13 18:30:03,141 INFO L430 AbstractCegarLoop]: === Iteration 119 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:30:03,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:30:03,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1370718820, now seen corresponding path program 11 times [2021-07-13 18:30:03,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:30:03,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197096875] [2021-07-13 18:30:03,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:30:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:30:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 33 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:30:03,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:30:03,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197096875] [2021-07-13 18:30:03,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197096875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:03,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367650909] [2021-07-13 18:30:03,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:30:04,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-07-13 18:30:04,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:30:04,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:30:04,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:30:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 33 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:30:04,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367650909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:04,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:30:04,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-07-13 18:30:04,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353547313] [2021-07-13 18:30:04,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 18:30:04,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:30:04,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 18:30:04,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-07-13 18:30:04,888 INFO L87 Difference]: Start difference. First operand 115214 states and 312165 transitions. Second operand has 27 states, 27 states have (on average 17.59259259259259) internal successors, (475), 27 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:06,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:30:06,094 INFO L93 Difference]: Finished difference Result 127423 states and 343370 transitions. [2021-07-13 18:30:06,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 18:30:06,095 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 17.59259259259259) internal successors, (475), 27 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 428 [2021-07-13 18:30:06,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:30:06,657 INFO L225 Difference]: With dead ends: 127423 [2021-07-13 18:30:06,658 INFO L226 Difference]: Without dead ends: 127423 [2021-07-13 18:30:06,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 497.7ms TimeCoverageRelationStatistics Valid=841, Invalid=1709, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 18:30:06,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127423 states. [2021-07-13 18:30:09,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127423 to 117696. [2021-07-13 18:30:09,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117696 states, 117694 states have (on average 2.7075721787006986) internal successors, (318665), 117695 states have internal predecessors, (318665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:09,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117696 states to 117696 states and 318665 transitions. [2021-07-13 18:30:09,677 INFO L78 Accepts]: Start accepts. Automaton has 117696 states and 318665 transitions. Word has length 428 [2021-07-13 18:30:09,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:30:09,678 INFO L482 AbstractCegarLoop]: Abstraction has 117696 states and 318665 transitions. [2021-07-13 18:30:09,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 17.59259259259259) internal successors, (475), 27 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:09,678 INFO L276 IsEmpty]: Start isEmpty. Operand 117696 states and 318665 transitions. [2021-07-13 18:30:10,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-13 18:30:10,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:30:10,439 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:30:10,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:30:10,640 INFO L430 AbstractCegarLoop]: === Iteration 120 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:30:10,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:30:10,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1307848988, now seen corresponding path program 35 times [2021-07-13 18:30:10,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:30:10,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860329116] [2021-07-13 18:30:10,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:30:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:30:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1669 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-13 18:30:10,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:30:10,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860329116] [2021-07-13 18:30:10,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860329116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:10,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983315784] [2021-07-13 18:30:10,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:30:11,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-13 18:30:11,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:30:11,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:30:11,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:30:11,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:30:11,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983315784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:11,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:30:11,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 24 [2021-07-13 18:30:11,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779297422] [2021-07-13 18:30:11,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 18:30:11,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:30:11,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 18:30:11,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-13 18:30:11,782 INFO L87 Difference]: Start difference. First operand 117696 states and 318665 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:13,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:30:13,225 INFO L93 Difference]: Finished difference Result 134006 states and 360130 transitions. [2021-07-13 18:30:13,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 18:30:13,226 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-07-13 18:30:13,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:30:13,587 INFO L225 Difference]: With dead ends: 134006 [2021-07-13 18:30:13,587 INFO L226 Difference]: Without dead ends: 134006 [2021-07-13 18:30:13,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 367.2ms TimeCoverageRelationStatistics Valid=629, Invalid=1441, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 18:30:13,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134006 states. [2021-07-13 18:30:16,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134006 to 118376. [2021-07-13 18:30:16,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118376 states, 118374 states have (on average 2.707984861540541) internal successors, (320555), 118375 states have internal predecessors, (320555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:17,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118376 states to 118376 states and 320555 transitions. [2021-07-13 18:30:17,300 INFO L78 Accepts]: Start accepts. Automaton has 118376 states and 320555 transitions. Word has length 429 [2021-07-13 18:30:17,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:30:17,300 INFO L482 AbstractCegarLoop]: Abstraction has 118376 states and 320555 transitions. [2021-07-13 18:30:17,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:17,301 INFO L276 IsEmpty]: Start isEmpty. Operand 118376 states and 320555 transitions. [2021-07-13 18:30:17,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-13 18:30:17,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:30:17,621 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:30:17,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:30:17,825 INFO L430 AbstractCegarLoop]: === Iteration 121 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:30:17,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:30:17,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1701005510, now seen corresponding path program 36 times [2021-07-13 18:30:17,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:30:17,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117611946] [2021-07-13 18:30:17,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:30:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:30:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:30:18,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:30:18,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117611946] [2021-07-13 18:30:18,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117611946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:18,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481320412] [2021-07-13 18:30:18,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:30:18,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-13 18:30:18,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:30:18,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:30:18,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:30:19,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:30:19,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481320412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:19,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:30:19,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-13 18:30:19,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502139874] [2021-07-13 18:30:19,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 18:30:19,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:30:19,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 18:30:19,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-13 18:30:19,621 INFO L87 Difference]: Start difference. First operand 118376 states and 320555 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:20,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:30:20,843 INFO L93 Difference]: Finished difference Result 141701 states and 379687 transitions. [2021-07-13 18:30:20,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 18:30:20,844 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-07-13 18:30:20,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:30:21,211 INFO L225 Difference]: With dead ends: 141701 [2021-07-13 18:30:21,212 INFO L226 Difference]: Without dead ends: 141701 [2021-07-13 18:30:21,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 371.5ms TimeCoverageRelationStatistics Valid=627, Invalid=1443, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 18:30:21,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141701 states. [2021-07-13 18:30:24,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141701 to 117696. [2021-07-13 18:30:24,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117696 states, 117694 states have (on average 2.7075721787006986) internal successors, (318665), 117695 states have internal predecessors, (318665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:24,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117696 states to 117696 states and 318665 transitions. [2021-07-13 18:30:24,580 INFO L78 Accepts]: Start accepts. Automaton has 117696 states and 318665 transitions. Word has length 429 [2021-07-13 18:30:24,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:30:24,580 INFO L482 AbstractCegarLoop]: Abstraction has 117696 states and 318665 transitions. [2021-07-13 18:30:24,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:24,580 INFO L276 IsEmpty]: Start isEmpty. Operand 117696 states and 318665 transitions. [2021-07-13 18:30:24,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-13 18:30:24,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:30:24,834 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:30:25,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-07-13 18:30:25,043 INFO L430 AbstractCegarLoop]: === Iteration 122 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:30:25,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:30:25,043 INFO L82 PathProgramCache]: Analyzing trace with hash -2095438632, now seen corresponding path program 37 times [2021-07-13 18:30:25,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:30:25,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183535851] [2021-07-13 18:30:25,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:30:25,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:30:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:30:25,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:30:25,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183535851] [2021-07-13 18:30:25,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183535851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:25,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846429382] [2021-07-13 18:30:25,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:30:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:30:25,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:30:25,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:30:26,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:30:26,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846429382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:26,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:30:26,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-13 18:30:26,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421214235] [2021-07-13 18:30:26,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 18:30:26,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:30:26,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 18:30:26,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-13 18:30:26,381 INFO L87 Difference]: Start difference. First operand 117696 states and 318665 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:27,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:30:27,507 INFO L93 Difference]: Finished difference Result 143841 states and 386037 transitions. [2021-07-13 18:30:27,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 18:30:27,507 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-07-13 18:30:27,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:30:28,132 INFO L225 Difference]: With dead ends: 143841 [2021-07-13 18:30:28,132 INFO L226 Difference]: Without dead ends: 143841 [2021-07-13 18:30:28,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 378.7ms TimeCoverageRelationStatistics Valid=639, Invalid=1523, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 18:30:28,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143841 states. [2021-07-13 18:30:30,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143841 to 117016. [2021-07-13 18:30:30,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117016 states, 117014 states have (on average 2.707154699437674) internal successors, (316775), 117015 states have internal predecessors, (316775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:31,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117016 states to 117016 states and 316775 transitions. [2021-07-13 18:30:31,538 INFO L78 Accepts]: Start accepts. Automaton has 117016 states and 316775 transitions. Word has length 429 [2021-07-13 18:30:31,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:30:31,539 INFO L482 AbstractCegarLoop]: Abstraction has 117016 states and 316775 transitions. [2021-07-13 18:30:31,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:31,539 INFO L276 IsEmpty]: Start isEmpty. Operand 117016 states and 316775 transitions. [2021-07-13 18:30:31,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-13 18:30:31,811 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:30:31,811 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:30:32,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:30:32,012 INFO L430 AbstractCegarLoop]: === Iteration 123 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:30:32,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:30:32,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1753327114, now seen corresponding path program 38 times [2021-07-13 18:30:32,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:30:32,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137701998] [2021-07-13 18:30:32,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:30:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:30:32,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:30:32,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:30:32,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137701998] [2021-07-13 18:30:32,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137701998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:32,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291820837] [2021-07-13 18:30:32,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:30:32,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:30:32,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:30:32,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:30:32,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:30:32,911 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:30:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:30:33,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291820837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:33,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:30:33,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-13 18:30:33,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118142498] [2021-07-13 18:30:33,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 18:30:33,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:30:33,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 18:30:33,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-13 18:30:33,169 INFO L87 Difference]: Start difference. First operand 117016 states and 316775 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:34,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:30:34,400 INFO L93 Difference]: Finished difference Result 148126 states and 396802 transitions. [2021-07-13 18:30:34,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 18:30:34,400 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-07-13 18:30:34,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:30:34,778 INFO L225 Difference]: With dead ends: 148126 [2021-07-13 18:30:34,778 INFO L226 Difference]: Without dead ends: 148126 [2021-07-13 18:30:34,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 391.8ms TimeCoverageRelationStatistics Valid=651, Invalid=1605, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 18:30:35,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148126 states. [2021-07-13 18:30:37,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148126 to 115656. [2021-07-13 18:30:38,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115656 states, 115654 states have (on average 2.706305013229114) internal successors, (312995), 115655 states have internal predecessors, (312995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:38,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115656 states to 115656 states and 312995 transitions. [2021-07-13 18:30:38,903 INFO L78 Accepts]: Start accepts. Automaton has 115656 states and 312995 transitions. Word has length 429 [2021-07-13 18:30:38,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:30:38,904 INFO L482 AbstractCegarLoop]: Abstraction has 115656 states and 312995 transitions. [2021-07-13 18:30:38,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:38,904 INFO L276 IsEmpty]: Start isEmpty. Operand 115656 states and 312995 transitions. [2021-07-13 18:30:39,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-13 18:30:39,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:30:39,218 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:30:39,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:30:39,457 INFO L430 AbstractCegarLoop]: === Iteration 124 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:30:39,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:30:39,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1571604844, now seen corresponding path program 39 times [2021-07-13 18:30:39,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:30:39,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365267537] [2021-07-13 18:30:39,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:30:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:30:40,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:30:40,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:30:40,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365267537] [2021-07-13 18:30:40,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365267537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:40,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231369576] [2021-07-13 18:30:40,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:30:40,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-13 18:30:40,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:30:40,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:30:40,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:30:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:30:41,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231369576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:41,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:30:41,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-13 18:30:41,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752933448] [2021-07-13 18:30:41,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 18:30:41,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:30:41,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 18:30:41,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-13 18:30:41,348 INFO L87 Difference]: Start difference. First operand 115656 states and 312995 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:42,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:30:42,516 INFO L93 Difference]: Finished difference Result 152051 states and 406986 transitions. [2021-07-13 18:30:42,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 18:30:42,517 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-07-13 18:30:42,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:30:43,118 INFO L225 Difference]: With dead ends: 152051 [2021-07-13 18:30:43,119 INFO L226 Difference]: Without dead ends: 152051 [2021-07-13 18:30:43,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 433.2ms TimeCoverageRelationStatistics Valid=663, Invalid=1689, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 18:30:43,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152051 states. [2021-07-13 18:30:45,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152051 to 116236. [2021-07-13 18:30:45,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116236 states, 116234 states have (on average 2.7062133282860437) internal successors, (314554), 116235 states have internal predecessors, (314554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:46,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116236 states to 116236 states and 314554 transitions. [2021-07-13 18:30:46,547 INFO L78 Accepts]: Start accepts. Automaton has 116236 states and 314554 transitions. Word has length 429 [2021-07-13 18:30:46,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:30:46,547 INFO L482 AbstractCegarLoop]: Abstraction has 116236 states and 314554 transitions. [2021-07-13 18:30:46,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:46,548 INFO L276 IsEmpty]: Start isEmpty. Operand 116236 states and 314554 transitions. [2021-07-13 18:30:46,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-13 18:30:46,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:30:46,796 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:30:47,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-13 18:30:47,008 INFO L430 AbstractCegarLoop]: === Iteration 125 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:30:47,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:30:47,008 INFO L82 PathProgramCache]: Analyzing trace with hash -962946382, now seen corresponding path program 40 times [2021-07-13 18:30:47,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:30:47,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285520452] [2021-07-13 18:30:47,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:30:47,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:30:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:30:47,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:30:47,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285520452] [2021-07-13 18:30:47,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285520452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:47,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704797674] [2021-07-13 18:30:47,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:30:47,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:30:47,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:30:47,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:30:47,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:30:48,124 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:30:48,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:30:48,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704797674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:48,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:30:48,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-13 18:30:48,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489793225] [2021-07-13 18:30:48,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 18:30:48,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:30:48,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 18:30:48,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-13 18:30:48,625 INFO L87 Difference]: Start difference. First operand 116236 states and 314554 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:49,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:30:49,781 INFO L93 Difference]: Finished difference Result 153516 states and 410830 transitions. [2021-07-13 18:30:49,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 18:30:49,782 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-07-13 18:30:49,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:30:50,171 INFO L225 Difference]: With dead ends: 153516 [2021-07-13 18:30:50,171 INFO L226 Difference]: Without dead ends: 153516 [2021-07-13 18:30:50,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 384.2ms TimeCoverageRelationStatistics Valid=675, Invalid=1775, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 18:30:50,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153516 states. [2021-07-13 18:30:53,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153516 to 114976. [2021-07-13 18:30:53,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114976 states, 114974 states have (on average 2.7058726320733384) internal successors, (311105), 114975 states have internal predecessors, (311105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:53,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114976 states to 114976 states and 311105 transitions. [2021-07-13 18:30:53,605 INFO L78 Accepts]: Start accepts. Automaton has 114976 states and 311105 transitions. Word has length 429 [2021-07-13 18:30:53,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:30:53,605 INFO L482 AbstractCegarLoop]: Abstraction has 114976 states and 311105 transitions. [2021-07-13 18:30:53,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:53,605 INFO L276 IsEmpty]: Start isEmpty. Operand 114976 states and 311105 transitions. [2021-07-13 18:30:54,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-13 18:30:54,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:30:54,366 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:30:54,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:30:54,566 INFO L430 AbstractCegarLoop]: === Iteration 126 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:30:54,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:30:54,567 INFO L82 PathProgramCache]: Analyzing trace with hash 500065872, now seen corresponding path program 41 times [2021-07-13 18:30:54,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:30:54,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809087054] [2021-07-13 18:30:54,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:30:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:30:54,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:30:54,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:30:54,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809087054] [2021-07-13 18:30:54,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809087054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:54,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714390423] [2021-07-13 18:30:54,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:30:55,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-13 18:30:55,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:30:55,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:30:55,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:30:55,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:30:55,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714390423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:55,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:30:55,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-13 18:30:55,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252137967] [2021-07-13 18:30:55,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 18:30:55,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:30:55,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 18:30:55,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-13 18:30:55,922 INFO L87 Difference]: Start difference. First operand 114976 states and 311105 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:57,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:30:57,157 INFO L93 Difference]: Finished difference Result 152841 states and 409174 transitions. [2021-07-13 18:30:57,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 18:30:57,158 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-07-13 18:30:57,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:30:57,570 INFO L225 Difference]: With dead ends: 152841 [2021-07-13 18:30:57,570 INFO L226 Difference]: Without dead ends: 152841 [2021-07-13 18:30:57,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 403.8ms TimeCoverageRelationStatistics Valid=687, Invalid=1863, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 18:30:57,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152841 states. [2021-07-13 18:31:00,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152841 to 113716. [2021-07-13 18:31:00,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113716 states, 113714 states have (on average 2.7055243857396625) internal successors, (307656), 113715 states have internal predecessors, (307656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113716 states to 113716 states and 307656 transitions. [2021-07-13 18:31:00,886 INFO L78 Accepts]: Start accepts. Automaton has 113716 states and 307656 transitions. Word has length 429 [2021-07-13 18:31:00,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:31:00,886 INFO L482 AbstractCegarLoop]: Abstraction has 113716 states and 307656 transitions. [2021-07-13 18:31:00,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:00,887 INFO L276 IsEmpty]: Start isEmpty. Operand 113716 states and 307656 transitions. [2021-07-13 18:31:01,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-13 18:31:01,116 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:31:01,116 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:31:01,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-13 18:31:01,316 INFO L430 AbstractCegarLoop]: === Iteration 127 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:31:01,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:31:01,317 INFO L82 PathProgramCache]: Analyzing trace with hash -706709138, now seen corresponding path program 42 times [2021-07-13 18:31:01,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:31:01,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425705349] [2021-07-13 18:31:01,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:31:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:31:01,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:31:01,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:31:01,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425705349] [2021-07-13 18:31:01,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425705349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:01,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183422936] [2021-07-13 18:31:01,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:31:02,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-13 18:31:02,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:31:02,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:31:02,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:31:03,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:31:03,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183422936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:03,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:31:03,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-13 18:31:03,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791448602] [2021-07-13 18:31:03,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 18:31:03,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:31:03,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 18:31:03,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-13 18:31:03,030 INFO L87 Difference]: Start difference. First operand 113716 states and 307656 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:04,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:31:04,169 INFO L93 Difference]: Finished difference Result 147066 states and 393838 transitions. [2021-07-13 18:31:04,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 18:31:04,169 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-07-13 18:31:04,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:31:04,792 INFO L225 Difference]: With dead ends: 147066 [2021-07-13 18:31:04,792 INFO L226 Difference]: Without dead ends: 147066 [2021-07-13 18:31:04,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 413.1ms TimeCoverageRelationStatistics Valid=699, Invalid=1953, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 18:31:05,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147066 states. [2021-07-13 18:31:07,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147066 to 113716. [2021-07-13 18:31:07,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113716 states, 113714 states have (on average 2.7055243857396625) internal successors, (307656), 113715 states have internal predecessors, (307656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:07,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113716 states to 113716 states and 307656 transitions. [2021-07-13 18:31:07,835 INFO L78 Accepts]: Start accepts. Automaton has 113716 states and 307656 transitions. Word has length 429 [2021-07-13 18:31:07,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:31:07,836 INFO L482 AbstractCegarLoop]: Abstraction has 113716 states and 307656 transitions. [2021-07-13 18:31:07,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:07,836 INFO L276 IsEmpty]: Start isEmpty. Operand 113716 states and 307656 transitions. [2021-07-13 18:31:08,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-13 18:31:08,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:31:08,602 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:31:08,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:31:08,803 INFO L430 AbstractCegarLoop]: === Iteration 128 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:31:08,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:31:08,804 INFO L82 PathProgramCache]: Analyzing trace with hash -818236404, now seen corresponding path program 43 times [2021-07-13 18:31:08,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:31:08,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908231761] [2021-07-13 18:31:08,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:31:08,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:31:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:31:09,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:31:09,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908231761] [2021-07-13 18:31:09,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908231761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:09,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467349501] [2021-07-13 18:31:09,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:31:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:31:09,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:31:09,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:31:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-13 18:31:09,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467349501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:09,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:31:09,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-13 18:31:09,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483108323] [2021-07-13 18:31:09,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 18:31:09,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:31:09,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 18:31:09,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-13 18:31:09,634 INFO L87 Difference]: Start difference. First operand 113716 states and 307656 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:11,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:31:11,088 INFO L93 Difference]: Finished difference Result 141826 states and 380190 transitions. [2021-07-13 18:31:11,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 18:31:11,089 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-07-13 18:31:11,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:31:11,456 INFO L225 Difference]: With dead ends: 141826 [2021-07-13 18:31:11,456 INFO L226 Difference]: Without dead ends: 141826 [2021-07-13 18:31:11,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 421.7ms TimeCoverageRelationStatistics Valid=711, Invalid=2045, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 18:31:11,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141826 states. [2021-07-13 18:31:13,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141826 to 110996. [2021-07-13 18:31:13,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110996 states, 110994 states have (on average 2.7037137142548247) internal successors, (300096), 110995 states have internal predecessors, (300096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:14,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110996 states to 110996 states and 300096 transitions. [2021-07-13 18:31:14,728 INFO L78 Accepts]: Start accepts. Automaton has 110996 states and 300096 transitions. Word has length 429 [2021-07-13 18:31:14,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:31:14,729 INFO L482 AbstractCegarLoop]: Abstraction has 110996 states and 300096 transitions. [2021-07-13 18:31:14,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:14,729 INFO L276 IsEmpty]: Start isEmpty. Operand 110996 states and 300096 transitions. [2021-07-13 18:31:15,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2021-07-13 18:31:15,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:31:15,283 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, 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 18:31:15,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-07-13 18:31:15,509 INFO L430 AbstractCegarLoop]: === Iteration 129 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:31:15,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:31:15,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1983477794, now seen corresponding path program 72 times [2021-07-13 18:31:15,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:31:15,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854665320] [2021-07-13 18:31:15,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:31:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:31:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 24 proven. 1124 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-07-13 18:31:15,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:31:15,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854665320] [2021-07-13 18:31:15,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854665320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:15,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270636814] [2021-07-13 18:31:15,716 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 18:31:16,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 18:31:16,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:31:16,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 18:31:16,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:31:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 24 proven. 1101 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-07-13 18:31:17,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270636814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:17,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:31:17,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-13 18:31:17,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90036877] [2021-07-13 18:31:17,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:31:17,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:31:17,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:31:17,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:31:17,070 INFO L87 Difference]: Start difference. First operand 110996 states and 300096 transitions. Second operand has 17 states, 17 states have (on average 21.705882352941178) internal successors, (369), 17 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:18,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:31:18,606 INFO L93 Difference]: Finished difference Result 202896 states and 543282 transitions. [2021-07-13 18:31:18,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:31:18,606 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.705882352941178) internal successors, (369), 17 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 448 [2021-07-13 18:31:18,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:31:19,216 INFO L225 Difference]: With dead ends: 202896 [2021-07-13 18:31:19,216 INFO L226 Difference]: Without dead ends: 202896 [2021-07-13 18:31:19,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 222.5ms TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 18:31:19,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202896 states. [2021-07-13 18:31:22,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202896 to 136196. [2021-07-13 18:31:23,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136196 states, 136194 states have (on average 2.711250128493179) internal successors, (369256), 136195 states have internal predecessors, (369256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:24,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136196 states to 136196 states and 369256 transitions. [2021-07-13 18:31:24,111 INFO L78 Accepts]: Start accepts. Automaton has 136196 states and 369256 transitions. Word has length 448 [2021-07-13 18:31:24,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:31:24,111 INFO L482 AbstractCegarLoop]: Abstraction has 136196 states and 369256 transitions. [2021-07-13 18:31:24,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 21.705882352941178) internal successors, (369), 17 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:24,112 INFO L276 IsEmpty]: Start isEmpty. Operand 136196 states and 369256 transitions. [2021-07-13 18:31:24,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-13 18:31:24,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:31:24,418 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, 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 18:31:24,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:31:24,619 INFO L430 AbstractCegarLoop]: === Iteration 130 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:31:24,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:31:24,619 INFO L82 PathProgramCache]: Analyzing trace with hash -2099316009, now seen corresponding path program 73 times [2021-07-13 18:31:24,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:31:24,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315245097] [2021-07-13 18:31:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:31:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:31:24,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-13 18:31:24,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:31:24,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315245097] [2021-07-13 18:31:24,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315245097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:24,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099567973] [2021-07-13 18:31:24,807 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 18:31:24,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:31:24,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 18:31:24,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:31:25,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:31:25,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099567973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:25,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:31:25,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-13 18:31:25,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163204470] [2021-07-13 18:31:25,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:31:25,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:31:25,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:31:25,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:31:25,719 INFO L87 Difference]: Start difference. First operand 136196 states and 369256 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:26,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:31:26,963 INFO L93 Difference]: Finished difference Result 191246 states and 514845 transitions. [2021-07-13 18:31:26,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 18:31:26,963 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-07-13 18:31:26,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:31:27,493 INFO L225 Difference]: With dead ends: 191246 [2021-07-13 18:31:27,493 INFO L226 Difference]: Without dead ends: 191246 [2021-07-13 18:31:27,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 286.9ms TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:31:28,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191246 states. [2021-07-13 18:31:31,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191246 to 138816. [2021-07-13 18:31:31,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138816 states, 138814 states have (on average 2.7121543936490555) internal successors, (376485), 138815 states have internal predecessors, (376485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:31,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138816 states to 138816 states and 376485 transitions. [2021-07-13 18:31:31,693 INFO L78 Accepts]: Start accepts. Automaton has 138816 states and 376485 transitions. Word has length 453 [2021-07-13 18:31:31,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:31:31,694 INFO L482 AbstractCegarLoop]: Abstraction has 138816 states and 376485 transitions. [2021-07-13 18:31:31,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:31,694 INFO L276 IsEmpty]: Start isEmpty. Operand 138816 states and 376485 transitions. [2021-07-13 18:31:32,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-13 18:31:32,529 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:31:32,530 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, 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 18:31:32,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-13 18:31:32,733 INFO L430 AbstractCegarLoop]: === Iteration 131 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:31:32,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:31:32,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1632211019, now seen corresponding path program 74 times [2021-07-13 18:31:32,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:31:32,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690149909] [2021-07-13 18:31:32,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:31:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:31:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-13 18:31:32,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:31:32,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690149909] [2021-07-13 18:31:32,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690149909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:32,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508298757] [2021-07-13 18:31:32,912 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:31:33,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:31:33,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:31:33,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 18:31:33,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:31:33,704 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:31:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:31:33,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508298757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:33,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:31:33,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-13 18:31:33,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377080362] [2021-07-13 18:31:33,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:31:33,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:31:33,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:31:33,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:31:33,780 INFO L87 Difference]: Start difference. First operand 138816 states and 376485 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:35,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:31:35,329 INFO L93 Difference]: Finished difference Result 242711 states and 655917 transitions. [2021-07-13 18:31:35,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:31:35,330 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-07-13 18:31:35,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:31:36,409 INFO L225 Difference]: With dead ends: 242711 [2021-07-13 18:31:36,409 INFO L226 Difference]: Without dead ends: 242711 [2021-07-13 18:31:36,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 279.4ms TimeCoverageRelationStatistics Valid=402, Invalid=1238, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:31:36,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242711 states. [2021-07-13 18:31:40,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242711 to 140176. [2021-07-13 18:31:40,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140176 states, 140174 states have (on average 2.7128069399460673) internal successors, (380265), 140175 states have internal predecessors, (380265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:41,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140176 states to 140176 states and 380265 transitions. [2021-07-13 18:31:41,044 INFO L78 Accepts]: Start accepts. Automaton has 140176 states and 380265 transitions. Word has length 453 [2021-07-13 18:31:41,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:31:41,044 INFO L482 AbstractCegarLoop]: Abstraction has 140176 states and 380265 transitions. [2021-07-13 18:31:41,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:41,045 INFO L276 IsEmpty]: Start isEmpty. Operand 140176 states and 380265 transitions. [2021-07-13 18:31:41,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-13 18:31:41,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:31:41,832 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, 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 18:31:42,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:31:42,053 INFO L430 AbstractCegarLoop]: === Iteration 132 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:31:42,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:31:42,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1989176617, now seen corresponding path program 75 times [2021-07-13 18:31:42,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:31:42,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483335278] [2021-07-13 18:31:42,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:31:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:31:42,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-13 18:31:42,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:31:42,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483335278] [2021-07-13 18:31:42,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483335278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:42,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565391776] [2021-07-13 18:31:42,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:31:42,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 18:31:42,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:31:42,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 18:31:42,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:31:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:31:43,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565391776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:43,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:31:43,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-13 18:31:43,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387216972] [2021-07-13 18:31:43,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:31:43,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:31:43,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:31:43,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:31:43,276 INFO L87 Difference]: Start difference. First operand 140176 states and 380265 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:44,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:31:44,795 INFO L93 Difference]: Finished difference Result 195006 states and 525329 transitions. [2021-07-13 18:31:44,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:31:44,796 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-07-13 18:31:44,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:31:45,366 INFO L225 Difference]: With dead ends: 195006 [2021-07-13 18:31:45,367 INFO L226 Difference]: Without dead ends: 195006 [2021-07-13 18:31:45,367 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 399.0ms TimeCoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:31:45,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195006 states. [2021-07-13 18:31:48,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195006 to 141436. [2021-07-13 18:31:48,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141436 states, 141434 states have (on average 2.71302515661015) internal successors, (383714), 141435 states have internal predecessors, (383714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:49,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141436 states to 141436 states and 383714 transitions. [2021-07-13 18:31:49,688 INFO L78 Accepts]: Start accepts. Automaton has 141436 states and 383714 transitions. Word has length 453 [2021-07-13 18:31:49,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:31:49,689 INFO L482 AbstractCegarLoop]: Abstraction has 141436 states and 383714 transitions. [2021-07-13 18:31:49,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:49,689 INFO L276 IsEmpty]: Start isEmpty. Operand 141436 states and 383714 transitions. [2021-07-13 18:31:49,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-13 18:31:49,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:31:49,992 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, 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 18:31:50,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:31:50,193 INFO L430 AbstractCegarLoop]: === Iteration 133 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:31:50,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:31:50,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1806118163, now seen corresponding path program 76 times [2021-07-13 18:31:50,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:31:50,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575809706] [2021-07-13 18:31:50,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:31:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:31:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-13 18:31:50,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:31:50,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575809706] [2021-07-13 18:31:50,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575809706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:50,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908624086] [2021-07-13 18:31:50,814 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:31:51,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:31:51,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:31:51,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 18:31:51,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:31:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:31:51,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908624086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:51,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:31:51,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-13 18:31:51,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000598479] [2021-07-13 18:31:51,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:31:51,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:31:51,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:31:51,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:31:51,856 INFO L87 Difference]: Start difference. First operand 141436 states and 383714 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:53,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:31:53,901 INFO L93 Difference]: Finished difference Result 237521 states and 641183 transitions. [2021-07-13 18:31:53,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:31:53,901 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-07-13 18:31:53,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:31:54,743 INFO L225 Difference]: With dead ends: 237521 [2021-07-13 18:31:54,743 INFO L226 Difference]: Without dead ends: 237521 [2021-07-13 18:31:54,743 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 727.8ms TimeCoverageRelationStatistics Valid=401, Invalid=1239, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:31:55,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237521 states. [2021-07-13 18:31:58,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237521 to 143476. [2021-07-13 18:31:58,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143476 states, 143474 states have (on average 2.7139690815060566) internal successors, (389384), 143475 states have internal predecessors, (389384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:59,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143476 states to 143476 states and 389384 transitions. [2021-07-13 18:31:59,861 INFO L78 Accepts]: Start accepts. Automaton has 143476 states and 389384 transitions. Word has length 453 [2021-07-13 18:31:59,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:31:59,862 INFO L482 AbstractCegarLoop]: Abstraction has 143476 states and 389384 transitions. [2021-07-13 18:31:59,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:59,862 INFO L276 IsEmpty]: Start isEmpty. Operand 143476 states and 389384 transitions. [2021-07-13 18:32:00,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-13 18:32:00,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:32:00,158 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, 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 18:32:00,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:32:00,358 INFO L430 AbstractCegarLoop]: === Iteration 134 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:32:00,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:32:00,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1449152565, now seen corresponding path program 77 times [2021-07-13 18:32:00,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:32:00,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725759740] [2021-07-13 18:32:00,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:32:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:32:00,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-13 18:32:00,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:32:00,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725759740] [2021-07-13 18:32:00,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725759740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:32:00,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117764200] [2021-07-13 18:32:00,543 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:32:01,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 18:32:01,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:32:01,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 18:32:01,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:32:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:32:01,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117764200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:32:01,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:32:01,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-13 18:32:01,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002782229] [2021-07-13 18:32:01,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:32:01,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:32:01,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:32:01,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:32:01,749 INFO L87 Difference]: Start difference. First operand 143476 states and 389384 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:03,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:32:03,597 INFO L93 Difference]: Finished difference Result 244576 states and 661325 transitions. [2021-07-13 18:32:03,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:32:03,598 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-07-13 18:32:03,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:32:04,381 INFO L225 Difference]: With dead ends: 244576 [2021-07-13 18:32:04,381 INFO L226 Difference]: Without dead ends: 244576 [2021-07-13 18:32:04,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 283.9ms TimeCoverageRelationStatistics Valid=391, Invalid=1169, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 18:32:05,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244576 states. [2021-07-13 18:32:08,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244576 to 143476. [2021-07-13 18:32:08,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143476 states, 143474 states have (on average 2.7139690815060566) internal successors, (389384), 143475 states have internal predecessors, (389384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:09,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143476 states to 143476 states and 389384 transitions. [2021-07-13 18:32:09,469 INFO L78 Accepts]: Start accepts. Automaton has 143476 states and 389384 transitions. Word has length 453 [2021-07-13 18:32:09,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:32:09,470 INFO L482 AbstractCegarLoop]: Abstraction has 143476 states and 389384 transitions. [2021-07-13 18:32:09,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:09,470 INFO L276 IsEmpty]: Start isEmpty. Operand 143476 states and 389384 transitions. [2021-07-13 18:32:09,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-13 18:32:09,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:32:09,800 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, 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 18:32:10,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-13 18:32:10,017 INFO L430 AbstractCegarLoop]: === Iteration 135 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:32:10,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:32:10,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1646646569, now seen corresponding path program 78 times [2021-07-13 18:32:10,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:32:10,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157753148] [2021-07-13 18:32:10,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:32:10,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:32:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-13 18:32:10,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:32:10,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157753148] [2021-07-13 18:32:10,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157753148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:32:10,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431601390] [2021-07-13 18:32:10,199 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:32:10,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 18:32:10,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:32:10,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 18:32:10,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:32:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:32:11,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431601390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:32:11,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:32:11,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-13 18:32:11,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027451884] [2021-07-13 18:32:11,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:32:11,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:32:11,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:32:11,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:32:11,472 INFO L87 Difference]: Start difference. First operand 143476 states and 389384 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:12,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:32:12,784 INFO L93 Difference]: Finished difference Result 196156 states and 527597 transitions. [2021-07-13 18:32:12,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:32:12,785 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-07-13 18:32:12,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:32:13,601 INFO L225 Difference]: With dead ends: 196156 [2021-07-13 18:32:13,601 INFO L226 Difference]: Without dead ends: 196156 [2021-07-13 18:32:13,602 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 293.4ms TimeCoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 18:32:13,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196156 states. [2021-07-13 18:32:16,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196156 to 144636. [2021-07-13 18:32:17,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144636 states, 144634 states have (on average 2.714009154140797) internal successors, (392538), 144635 states have internal predecessors, (392538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:18,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144636 states to 144636 states and 392538 transitions. [2021-07-13 18:32:18,016 INFO L78 Accepts]: Start accepts. Automaton has 144636 states and 392538 transitions. Word has length 453 [2021-07-13 18:32:18,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:32:18,016 INFO L482 AbstractCegarLoop]: Abstraction has 144636 states and 392538 transitions. [2021-07-13 18:32:18,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:18,016 INFO L276 IsEmpty]: Start isEmpty. Operand 144636 states and 392538 transitions. [2021-07-13 18:32:18,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-13 18:32:18,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:32:18,318 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, 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 18:32:18,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-13 18:32:18,519 INFO L430 AbstractCegarLoop]: === Iteration 136 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:32:18,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:32:18,519 INFO L82 PathProgramCache]: Analyzing trace with hash -977333519, now seen corresponding path program 79 times [2021-07-13 18:32:18,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:32:18,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036644136] [2021-07-13 18:32:18,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:32:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:32:18,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-13 18:32:18,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:32:18,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036644136] [2021-07-13 18:32:18,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036644136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:32:18,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347325697] [2021-07-13 18:32:18,737 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:32:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:32:18,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 18:32:18,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:32:19,424 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-07-13 18:32:19,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:32:19,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347325697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:32:19,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:32:19,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-13 18:32:19,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883349712] [2021-07-13 18:32:19,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:32:19,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:32:19,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:32:19,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:32:19,738 INFO L87 Difference]: Start difference. First operand 144636 states and 392538 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:21,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:32:21,089 INFO L93 Difference]: Finished difference Result 209401 states and 563969 transitions. [2021-07-13 18:32:21,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 18:32:21,090 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-07-13 18:32:21,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:32:22,015 INFO L225 Difference]: With dead ends: 209401 [2021-07-13 18:32:22,015 INFO L226 Difference]: Without dead ends: 209401 [2021-07-13 18:32:22,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 306.5ms TimeCoverageRelationStatistics Valid=417, Invalid=1305, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:32:22,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209401 states. [2021-07-13 18:32:25,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209401 to 146676. [2021-07-13 18:32:25,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146676 states, 146674 states have (on average 2.7149187995145696) internal successors, (398208), 146675 states have internal predecessors, (398208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:26,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146676 states to 146676 states and 398208 transitions. [2021-07-13 18:32:26,498 INFO L78 Accepts]: Start accepts. Automaton has 146676 states and 398208 transitions. Word has length 453 [2021-07-13 18:32:26,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:32:26,499 INFO L482 AbstractCegarLoop]: Abstraction has 146676 states and 398208 transitions. [2021-07-13 18:32:26,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:26,499 INFO L276 IsEmpty]: Start isEmpty. Operand 146676 states and 398208 transitions. [2021-07-13 18:32:26,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-13 18:32:26,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:32:26,799 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, 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 18:32:26,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-13 18:32:27,000 INFO L430 AbstractCegarLoop]: === Iteration 137 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:32:27,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:32:27,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1334299117, now seen corresponding path program 80 times [2021-07-13 18:32:27,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:32:27,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833653834] [2021-07-13 18:32:27,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:32:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:32:27,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-13 18:32:27,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:32:27,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833653834] [2021-07-13 18:32:27,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833653834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:32:27,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363280966] [2021-07-13 18:32:27,635 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:32:27,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:32:27,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:32:27,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 18:32:27,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:32:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:32:28,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363280966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:32:28,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:32:28,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-13 18:32:28,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137876737] [2021-07-13 18:32:28,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:32:28,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:32:28,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:32:28,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:32:28,289 INFO L87 Difference]: Start difference. First operand 146676 states and 398208 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:29,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:32:29,971 INFO L93 Difference]: Finished difference Result 218806 states and 590153 transitions. [2021-07-13 18:32:29,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:32:29,972 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-07-13 18:32:29,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:32:31,286 INFO L225 Difference]: With dead ends: 218806 [2021-07-13 18:32:31,287 INFO L226 Difference]: Without dead ends: 218806 [2021-07-13 18:32:31,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 727.7ms TimeCoverageRelationStatistics Valid=406, Invalid=1234, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:32:31,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218806 states. [2021-07-13 18:32:34,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218806 to 145996. [2021-07-13 18:32:35,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145996 states, 145994 states have (on average 2.7146184089757113) internal successors, (396318), 145995 states have internal predecessors, (396318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:36,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145996 states to 145996 states and 396318 transitions. [2021-07-13 18:32:36,104 INFO L78 Accepts]: Start accepts. Automaton has 145996 states and 396318 transitions. Word has length 453 [2021-07-13 18:32:36,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:32:36,105 INFO L482 AbstractCegarLoop]: Abstraction has 145996 states and 396318 transitions. [2021-07-13 18:32:36,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:36,105 INFO L276 IsEmpty]: Start isEmpty. Operand 145996 states and 396318 transitions. [2021-07-13 18:32:36,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-13 18:32:36,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:32:36,417 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, 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 18:32:36,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-13 18:32:36,633 INFO L430 AbstractCegarLoop]: === Iteration 138 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:32:36,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:32:36,633 INFO L82 PathProgramCache]: Analyzing trace with hash -135130955, now seen corresponding path program 81 times [2021-07-13 18:32:36,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:32:36,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012955801] [2021-07-13 18:32:36,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:32:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:32:37,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-13 18:32:37,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:32:37,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012955801] [2021-07-13 18:32:37,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012955801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:32:37,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916344939] [2021-07-13 18:32:37,324 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:32:37,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 18:32:37,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:32:37,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 18:32:37,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:32:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-13 18:32:38,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916344939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:32:38,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:32:38,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-13 18:32:38,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440942783] [2021-07-13 18:32:38,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:32:38,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:32:38,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:32:38,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:32:38,358 INFO L87 Difference]: Start difference. First operand 145996 states and 396318 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:40,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:32:40,047 INFO L93 Difference]: Finished difference Result 216356 states and 582998 transitions. [2021-07-13 18:32:40,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:32:40,048 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-07-13 18:32:40,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:32:40,749 INFO L225 Difference]: With dead ends: 216356 [2021-07-13 18:32:40,749 INFO L226 Difference]: Without dead ends: 216356 [2021-07-13 18:32:40,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 366.4ms TimeCoverageRelationStatistics Valid=395, Invalid=1165, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 18:32:41,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216356 states. Received shutdown request... [2021-07-13 18:32:42,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-07-13 18:32:42,623 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 18:32:42,623 INFO L301 ceAbstractionStarter]: Result for error location t1Thread1of1ForFork1 was TIMEOUT (1/3) [2021-07-13 18:32:42,625 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-07-13 18:32:42,625 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 18:32:42,626 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 18:32:42,626 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 18:32:42,626 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 18:32:42,626 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 18:32:42,626 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 18:32:42,626 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 18:32:42,626 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 18:32:42,629 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 145 places, 150 transitions, 322 flow [2021-07-13 18:32:42,629 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 18:32:42,629 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was TIMEOUT (2/3) [2021-07-13 18:32:42,630 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-13 18:32:42,630 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 18:32:42,630 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 18:32:42,630 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 18:32:42,630 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 18:32:42,630 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 18:32:42,630 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 18:32:42,630 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 18:32:42,630 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == t2Thread1of1ForFork0======== [2021-07-13 18:32:42,632 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 145 places, 150 transitions, 322 flow [2021-07-13 18:32:42,633 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 18:32:42,633 INFO L301 ceAbstractionStarter]: Result for error location t2Thread1of1ForFork0 was TIMEOUT (3/3) [2021-07-13 18:32:42,633 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 18:32:42,635 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 18:32:42,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 06:32:42 BasicIcfg [2021-07-13 18:32:42,635 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 18:32:42,636 INFO L168 Benchmark]: Toolchain (without parser) took 667493.39 ms. Allocated memory was 202.4 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 164.7 MB in the beginning and 6.0 GB in the end (delta: -5.9 GB). Peak memory consumption was 1.9 GB. Max. memory is 8.0 GB. [2021-07-13 18:32:42,636 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 202.4 MB. Free memory is still 183.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 18:32:42,636 INFO L168 Benchmark]: CACSL2BoogieTranslator took 518.04 ms. Allocated memory is still 202.4 MB. Free memory was 164.5 MB in the beginning and 166.1 MB in the end (delta: -1.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-07-13 18:32:42,636 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.54 ms. Allocated memory is still 202.4 MB. Free memory was 166.1 MB in the beginning and 163.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 18:32:42,636 INFO L168 Benchmark]: Boogie Preprocessor took 24.04 ms. Allocated memory is still 202.4 MB. Free memory was 163.6 MB in the beginning and 162.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 18:32:42,636 INFO L168 Benchmark]: RCFGBuilder took 668.24 ms. Allocated memory is still 202.4 MB. Free memory was 162.1 MB in the beginning and 128.5 MB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. [2021-07-13 18:32:42,636 INFO L168 Benchmark]: TraceAbstraction took 666232.47 ms. Allocated memory was 202.4 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 128.5 MB in the beginning and 6.0 GB in the end (delta: -5.9 GB). Peak memory consumption was 1.9 GB. Max. memory is 8.0 GB. [2021-07-13 18:32:42,637 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 202.4 MB. Free memory is still 183.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 518.04 ms. Allocated memory is still 202.4 MB. Free memory was 164.5 MB in the beginning and 166.1 MB in the end (delta: -1.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 41.54 ms. Allocated memory is still 202.4 MB. Free memory was 166.1 MB in the beginning and 163.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 24.04 ms. Allocated memory is still 202.4 MB. Free memory was 163.6 MB in the beginning and 162.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 668.24 ms. Allocated memory is still 202.4 MB. Free memory was 162.1 MB in the beginning and 128.5 MB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 666232.47 ms. Allocated memory was 202.4 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 128.5 MB in the beginning and 6.0 GB in the end (delta: -5.9 GB). Peak memory consumption was 1.9 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 145 places, 150 transitions, 322 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, 230 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 666053.8ms, OverallIterations: 138, TraceHistogramMax: 12, EmptinessCheckTime: 28461.7ms, AutomataDifference: 162352.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 270.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 20709 SDtfs, 178505 SDslu, 177488 SDs, 0 SdLazy, 20738 SolverSat, 5795 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11709.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54380 GetRequests, 49676 SyntacticMatches, 1 SemanticMatches, 4703 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37905 ImplicationChecksByTransitivity, 39879.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=146676occurred in iteration=136, InterpolantAutomatonStates: 3816, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 295621.7ms AutomataMinimizationTime, 138 MinimizatonAttempts, 4148747 StatesRemovedByMinimization, 137 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6959.6ms SsaConstructionTime, 37187.2ms SatisfiabilityAnalysisTime, 98753.0ms InterpolantComputationTime, 98430 NumberOfCodeBlocks, 98265 NumberOfCodeBlocksAsserted, 820 NumberOfCheckSat, 98157 ConstructedInterpolants, 0 QuantifiedInterpolants, 285082 SizeOfPredicates, 2470 NumberOfNonLiveVariables, 94829 ConjunctsInSsa, 2754 ConjunctsInUnsatCore, 273 InterpolantComputations, 4 PerfectInterpolantSequences, 21026/284814 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, 230 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 3.8ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3.1ms, 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, 230 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 2.8ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2.2ms, 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