/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-keepdead.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-aa1e80b [2020-12-17 20:42:31,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-17 20:42:31,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-17 20:42:31,733 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-17 20:42:31,733 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-17 20:42:31,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-17 20:42:31,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-17 20:42:31,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-17 20:42:31,741 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-17 20:42:31,742 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-17 20:42:31,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-17 20:42:31,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-17 20:42:31,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-17 20:42:31,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-17 20:42:31,748 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-17 20:42:31,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-17 20:42:31,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-17 20:42:31,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-17 20:42:31,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-17 20:42:31,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-17 20:42:31,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-17 20:42:31,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-17 20:42:31,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-17 20:42:31,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-17 20:42:31,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-17 20:42:31,764 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-17 20:42:31,765 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-17 20:42:31,766 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-17 20:42:31,767 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-17 20:42:31,768 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-17 20:42:31,768 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-17 20:42:31,769 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-17 20:42:31,770 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-17 20:42:31,771 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-17 20:42:31,772 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-17 20:42:31,773 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-17 20:42:31,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-17 20:42:31,774 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-17 20:42:31,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-17 20:42:31,775 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-17 20:42:31,776 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-17 20:42:31,779 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-keepdead.epf [2020-12-17 20:42:31,809 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-17 20:42:31,810 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-17 20:42:31,811 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-17 20:42:31,811 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-17 20:42:31,812 INFO L138 SettingsManager]: * Use SBE=true [2020-12-17 20:42:31,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-17 20:42:31,814 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-17 20:42:31,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-17 20:42:31,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-17 20:42:31,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-17 20:42:31,815 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-17 20:42:31,816 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-17 20:42:31,816 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-17 20:42:31,816 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-17 20:42:31,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-17 20:42:31,816 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-17 20:42:31,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-17 20:42:31,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-17 20:42:31,817 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-17 20:42:31,817 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-17 20:42:31,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-17 20:42:31,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-17 20:42:31,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-17 20:42:31,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-17 20:42:31,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-17 20:42:31,819 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-17 20:42:31,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-17 20:42:31,819 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-12-17 20:42:31,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-17 20:42:31,819 INFO L138 SettingsManager]: * Remove dead ends from automaton=false [2020-12-17 20:42:31,820 INFO L138 SettingsManager]: * Minimization of abstraction=NONE [2020-12-17 20:42:31,820 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-17 20:42:32,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-17 20:42:32,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-17 20:42:32,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-17 20:42:32,264 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-17 20:42:32,264 INFO L275 PluginConnector]: CDTParser initialized [2020-12-17 20:42:32,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-12-17 20:42:32,344 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce4e721e5/588b8fc3fe6d427698b333ec9a3bba67/FLAG8df77d399 [2020-12-17 20:42:32,970 INFO L306 CDTParser]: Found 1 translation units. [2020-12-17 20:42:32,971 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-12-17 20:42:32,990 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce4e721e5/588b8fc3fe6d427698b333ec9a3bba67/FLAG8df77d399 [2020-12-17 20:42:33,260 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce4e721e5/588b8fc3fe6d427698b333ec9a3bba67 [2020-12-17 20:42:33,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-17 20:42:33,265 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-12-17 20:42:33,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-17 20:42:33,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-17 20:42:33,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-17 20:42:33,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:42:33" (1/1) ... [2020-12-17 20:42:33,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@572707ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:42:33, skipping insertion in model container [2020-12-17 20:42:33,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:42:33" (1/1) ... [2020-12-17 20:42:33,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-17 20:42:33,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-17 20:42:33,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-17 20:42:33,810 INFO L203 MainTranslator]: Completed pre-run [2020-12-17 20:42:33,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-17 20:42:34,012 INFO L208 MainTranslator]: Completed translation [2020-12-17 20:42:34,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:42:34 WrapperNode [2020-12-17 20:42:34,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-17 20:42:34,015 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-17 20:42:34,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-17 20:42:34,017 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-17 20:42:34,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:42:34" (1/1) ... [2020-12-17 20:42:34,066 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:42:34" (1/1) ... [2020-12-17 20:42:34,096 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-17 20:42:34,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-17 20:42:34,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-17 20:42:34,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-17 20:42:34,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:42:34" (1/1) ... [2020-12-17 20:42:34,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:42:34" (1/1) ... [2020-12-17 20:42:34,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:42:34" (1/1) ... [2020-12-17 20:42:34,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:42:34" (1/1) ... [2020-12-17 20:42:34,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:42:34" (1/1) ... [2020-12-17 20:42:34,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:42:34" (1/1) ... [2020-12-17 20:42:34,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:42:34" (1/1) ... [2020-12-17 20:42:34,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-17 20:42:34,168 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-17 20:42:34,168 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-17 20:42:34,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-17 20:42:34,169 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:42:34" (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 [2020-12-17 20:42:34,268 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-12-17 20:42:34,268 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-12-17 20:42:34,269 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-12-17 20:42:34,269 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-12-17 20:42:34,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-17 20:42:34,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-17 20:42:34,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-17 20:42:34,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-17 20:42:34,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-17 20:42:34,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-17 20:42:34,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-17 20:42:34,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-17 20:42:34,272 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-17 20:42:34,725 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-17 20:42:34,725 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-17 20:42:34,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:42:34 BoogieIcfgContainer [2020-12-17 20:42:34,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-17 20:42:34,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-17 20:42:34,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-17 20:42:34,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-17 20:42:34,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 08:42:33" (1/3) ... [2020-12-17 20:42:34,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d8ec55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:42:34, skipping insertion in model container [2020-12-17 20:42:34,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:42:34" (2/3) ... [2020-12-17 20:42:34,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d8ec55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:42:34, skipping insertion in model container [2020-12-17 20:42:34,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:42:34" (3/3) ... [2020-12-17 20:42:34,736 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-12-17 20:42:34,751 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-17 20:42:34,752 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-17 20:42:34,755 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-17 20:42:34,757 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-17 20:42:34,791 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,791 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,791 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,792 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,792 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,792 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,792 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,792 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,793 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,793 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,793 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,794 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,794 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,794 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,794 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,795 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,795 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,795 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,795 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,796 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,796 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,796 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,796 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,797 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,797 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,797 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,797 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,797 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,798 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,798 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,798 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,799 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,799 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,799 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,799 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,799 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,800 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,800 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,800 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,801 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,801 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,801 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,801 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,802 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,802 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,802 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,802 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,803 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,803 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,803 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,803 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,804 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,804 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,804 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,804 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,804 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,807 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,807 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,807 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,807 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,808 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,808 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,814 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,814 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,815 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,815 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,815 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,815 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:42:34,820 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-17 20:42:34,833 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-17 20:42:34,856 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-17 20:42:34,857 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-17 20:42:34,857 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-17 20:42:34,857 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-17 20:42:34,857 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-17 20:42:34,857 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-17 20:42:34,857 INFO L383 AbstractCegarLoop]: Minimize is NONE [2020-12-17 20:42:34,858 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-17 20:42:34,869 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 64 transitions, 138 flow [2020-12-17 20:42:35,001 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:35,010 INFO L276 IsEmpty]: Start isEmpty. Operand has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:35,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-17 20:42:35,026 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:35,027 INFO L504 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] [2020-12-17 20:42:35,028 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:35,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:35,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1900887756, now seen corresponding path program 1 times [2020-12-17 20:42:35,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:35,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908693316] [2020-12-17 20:42:35,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:35,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:35,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908693316] [2020-12-17 20:42:35,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:42:35,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-17 20:42:35,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033624131] [2020-12-17 20:42:35,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-17 20:42:35,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:35,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-17 20:42:35,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-17 20:42:35,567 INFO L87 Difference]: Start difference. First operand has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:35,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:35,788 INFO L93 Difference]: Finished difference Result 3336 states and 9728 transitions. [2020-12-17 20:42:35,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-17 20:42:35,791 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2020-12-17 20:42:35,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:35,801 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-17 20:42:35,802 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 9728 transitions. Word has length 28 [2020-12-17 20:42:35,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:35,803 INFO L481 AbstractCegarLoop]: Abstraction has 3336 states and 9728 transitions. [2020-12-17 20:42:35,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:35,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 9728 transitions. [2020-12-17 20:42:35,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-17 20:42:35,815 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:35,816 INFO L504 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] [2020-12-17 20:42:35,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-17 20:42:35,816 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:35,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:35,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1199752031, now seen corresponding path program 1 times [2020-12-17 20:42:35,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:35,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535527319] [2020-12-17 20:42:35,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:36,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535527319] [2020-12-17 20:42:36,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:42:36,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-17 20:42:36,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136875292] [2020-12-17 20:42:36,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-17 20:42:36,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:36,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-17 20:42:36,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-17 20:42:36,023 INFO L87 Difference]: Start difference. First operand 3336 states and 9728 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:36,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:36,230 INFO L93 Difference]: Finished difference Result 6379 states and 18647 transitions. [2020-12-17 20:42:36,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-17 20:42:36,231 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2020-12-17 20:42:36,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:36,233 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-17 20:42:36,233 INFO L78 Accepts]: Start accepts. Automaton has 6379 states and 18647 transitions. Word has length 32 [2020-12-17 20:42:36,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:36,234 INFO L481 AbstractCegarLoop]: Abstraction has 6379 states and 18647 transitions. [2020-12-17 20:42:36,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:36,234 INFO L276 IsEmpty]: Start isEmpty. Operand 6379 states and 18647 transitions. [2020-12-17 20:42:36,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-17 20:42:36,238 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:36,238 INFO L504 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] [2020-12-17 20:42:36,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-17 20:42:36,239 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:36,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:36,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1202725261, now seen corresponding path program 2 times [2020-12-17 20:42:36,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:36,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920447523] [2020-12-17 20:42:36,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:36,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920447523] [2020-12-17 20:42:36,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:42:36,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-17 20:42:36,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308382884] [2020-12-17 20:42:36,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-17 20:42:36,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:36,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-17 20:42:36,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-17 20:42:36,544 INFO L87 Difference]: Start difference. First operand 6379 states and 18647 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:36,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:36,807 INFO L93 Difference]: Finished difference Result 7067 states and 20591 transitions. [2020-12-17 20:42:36,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-17 20:42:36,808 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2020-12-17 20:42:36,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:36,811 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-12-17 20:42:36,811 INFO L78 Accepts]: Start accepts. Automaton has 7067 states and 20591 transitions. Word has length 32 [2020-12-17 20:42:36,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:36,812 INFO L481 AbstractCegarLoop]: Abstraction has 7067 states and 20591 transitions. [2020-12-17 20:42:36,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:36,812 INFO L276 IsEmpty]: Start isEmpty. Operand 7067 states and 20591 transitions. [2020-12-17 20:42:36,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-17 20:42:36,824 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:36,824 INFO L504 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] [2020-12-17 20:42:36,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-17 20:42:36,824 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:36,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:36,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1299742308, now seen corresponding path program 1 times [2020-12-17 20:42:36,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:36,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017097066] [2020-12-17 20:42:36,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:37,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:37,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017097066] [2020-12-17 20:42:37,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:42:37,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-17 20:42:37,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461240646] [2020-12-17 20:42:37,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-17 20:42:37,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:37,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-17 20:42:37,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-17 20:42:37,044 INFO L87 Difference]: Start difference. First operand 7067 states and 20591 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:37,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:37,313 INFO L93 Difference]: Finished difference Result 9179 states and 26799 transitions. [2020-12-17 20:42:37,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-17 20:42:37,314 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2020-12-17 20:42:37,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:37,315 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:42:37,315 INFO L78 Accepts]: Start accepts. Automaton has 9179 states and 26799 transitions. Word has length 36 [2020-12-17 20:42:37,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:37,316 INFO L481 AbstractCegarLoop]: Abstraction has 9179 states and 26799 transitions. [2020-12-17 20:42:37,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:37,316 INFO L276 IsEmpty]: Start isEmpty. Operand 9179 states and 26799 transitions. [2020-12-17 20:42:37,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-17 20:42:37,324 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:37,324 INFO L504 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] [2020-12-17 20:42:37,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-17 20:42:37,324 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:37,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:37,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1296769078, now seen corresponding path program 2 times [2020-12-17 20:42:37,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:37,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625234516] [2020-12-17 20:42:37,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:37,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625234516] [2020-12-17 20:42:37,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:42:37,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-17 20:42:37,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810397337] [2020-12-17 20:42:37,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-17 20:42:37,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:37,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-17 20:42:37,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-17 20:42:37,479 INFO L87 Difference]: Start difference. First operand 9179 states and 26799 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:37,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:37,761 INFO L93 Difference]: Finished difference Result 9115 states and 26543 transitions. [2020-12-17 20:42:37,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-17 20:42:37,761 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2020-12-17 20:42:37,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:37,762 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:42:37,762 INFO L78 Accepts]: Start accepts. Automaton has 9115 states and 26543 transitions. Word has length 36 [2020-12-17 20:42:37,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:37,763 INFO L481 AbstractCegarLoop]: Abstraction has 9115 states and 26543 transitions. [2020-12-17 20:42:37,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:37,763 INFO L276 IsEmpty]: Start isEmpty. Operand 9115 states and 26543 transitions. [2020-12-17 20:42:37,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-17 20:42:37,771 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:37,771 INFO L504 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] [2020-12-17 20:42:37,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-17 20:42:37,772 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:37,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:37,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1841087432, now seen corresponding path program 3 times [2020-12-17 20:42:37,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:37,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261232390] [2020-12-17 20:42:37,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:37,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261232390] [2020-12-17 20:42:37,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:42:37,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-17 20:42:37,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509331429] [2020-12-17 20:42:37,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-17 20:42:37,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:37,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-17 20:42:37,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-17 20:42:37,884 INFO L87 Difference]: Start difference. First operand 9115 states and 26543 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:38,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:38,300 INFO L93 Difference]: Finished difference Result 9947 states and 28975 transitions. [2020-12-17 20:42:38,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-17 20:42:38,300 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2020-12-17 20:42:38,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:38,302 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:42:38,302 INFO L78 Accepts]: Start accepts. Automaton has 9947 states and 28975 transitions. Word has length 36 [2020-12-17 20:42:38,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:38,303 INFO L481 AbstractCegarLoop]: Abstraction has 9947 states and 28975 transitions. [2020-12-17 20:42:38,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:38,303 INFO L276 IsEmpty]: Start isEmpty. Operand 9947 states and 28975 transitions. [2020-12-17 20:42:38,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-17 20:42:38,316 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:38,317 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:42:38,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-17 20:42:38,317 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:38,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:38,320 INFO L82 PathProgramCache]: Analyzing trace with hash -940103400, now seen corresponding path program 1 times [2020-12-17 20:42:38,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:38,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13584092] [2020-12-17 20:42:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:38,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:38,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13584092] [2020-12-17 20:42:38,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694249298] [2020-12-17 20:42:38,489 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 [2020-12-17 20:42:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:38,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-17 20:42:38,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:38,863 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:38,897 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:38,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:38,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:38,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-12-17 20:42:38,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391054146] [2020-12-17 20:42:38,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-17 20:42:38,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:38,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-17 20:42:38,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-17 20:42:38,914 INFO L87 Difference]: Start difference. First operand 9947 states and 28975 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:39,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:39,340 INFO L93 Difference]: Finished difference Result 13083 states and 38191 transitions. [2020-12-17 20:42:39,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-17 20:42:39,340 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2020-12-17 20:42:39,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:39,343 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2020-12-17 20:42:39,344 INFO L78 Accepts]: Start accepts. Automaton has 13083 states and 38191 transitions. Word has length 41 [2020-12-17 20:42:39,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:39,344 INFO L481 AbstractCegarLoop]: Abstraction has 13083 states and 38191 transitions. [2020-12-17 20:42:39,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:39,344 INFO L276 IsEmpty]: Start isEmpty. Operand 13083 states and 38191 transitions. [2020-12-17 20:42:39,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-17 20:42:39,369 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:39,369 INFO L504 BasicCegarLoop]: trace histogram [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] [2020-12-17 20:42:39,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-17 20:42:39,585 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:39,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:39,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1546743908, now seen corresponding path program 1 times [2020-12-17 20:42:39,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:39,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636639740] [2020-12-17 20:42:39,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:39,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-17 20:42:39,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636639740] [2020-12-17 20:42:39,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059933897] [2020-12-17 20:42:39,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-17 20:42:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:39,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-17 20:42:39,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:39,804 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-17 20:42:39,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:39,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-12-17 20:42:39,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013857740] [2020-12-17 20:42:39,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-17 20:42:39,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:39,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-17 20:42:39,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-17 20:42:39,813 INFO L87 Difference]: Start difference. First operand 13083 states and 38191 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:40,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:40,078 INFO L93 Difference]: Finished difference Result 16539 states and 48303 transitions. [2020-12-17 20:42:40,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-17 20:42:40,079 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2020-12-17 20:42:40,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:40,080 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-12-17 20:42:40,080 INFO L78 Accepts]: Start accepts. Automaton has 16539 states and 48303 transitions. Word has length 46 [2020-12-17 20:42:40,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:40,081 INFO L481 AbstractCegarLoop]: Abstraction has 16539 states and 48303 transitions. [2020-12-17 20:42:40,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 16539 states and 48303 transitions. [2020-12-17 20:42:40,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-17 20:42:40,124 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:40,125 INFO L504 BasicCegarLoop]: trace histogram [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] [2020-12-17 20:42:40,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:40,341 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:40,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:40,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1378232494, now seen corresponding path program 2 times [2020-12-17 20:42:40,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:40,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297507731] [2020-12-17 20:42:40,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-17 20:42:40,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297507731] [2020-12-17 20:42:40,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267029904] [2020-12-17 20:42:40,495 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 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 [2020-12-17 20:42:40,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:42:40,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:40,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-17 20:42:40,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:40,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:42:40,613 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-17 20:42:40,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:40,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-17 20:42:40,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976356004] [2020-12-17 20:42:40,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-17 20:42:40,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:40,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-17 20:42:40,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-17 20:42:40,685 INFO L87 Difference]: Start difference. First operand 16539 states and 48303 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:41,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:41,100 INFO L93 Difference]: Finished difference Result 20379 states and 59503 transitions. [2020-12-17 20:42:41,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-17 20:42:41,101 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2020-12-17 20:42:41,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:41,102 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2020-12-17 20:42:41,102 INFO L78 Accepts]: Start accepts. Automaton has 20379 states and 59503 transitions. Word has length 46 [2020-12-17 20:42:41,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:41,102 INFO L481 AbstractCegarLoop]: Abstraction has 20379 states and 59503 transitions. [2020-12-17 20:42:41,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:41,103 INFO L276 IsEmpty]: Start isEmpty. Operand 20379 states and 59503 transitions. [2020-12-17 20:42:41,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-17 20:42:41,124 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:41,124 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:42:41,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:41,339 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:41,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:41,340 INFO L82 PathProgramCache]: Analyzing trace with hash -443954361, now seen corresponding path program 1 times [2020-12-17 20:42:41,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:41,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567261014] [2020-12-17 20:42:41,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:41,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:41,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567261014] [2020-12-17 20:42:41,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163388267] [2020-12-17 20:42:41,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:41,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:41,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-17 20:42:41,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:41,585 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:41,621 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:41,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:41,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-12-17 20:42:41,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056041817] [2020-12-17 20:42:41,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-17 20:42:41,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:41,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-17 20:42:41,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-17 20:42:41,637 INFO L87 Difference]: Start difference. First operand 20379 states and 59503 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:42,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:42,302 INFO L93 Difference]: Finished difference Result 29851 states and 87279 transitions. [2020-12-17 20:42:42,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-17 20:42:42,303 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2020-12-17 20:42:42,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:42,304 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-12-17 20:42:42,304 INFO L78 Accepts]: Start accepts. Automaton has 29851 states and 87279 transitions. Word has length 46 [2020-12-17 20:42:42,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:42,305 INFO L481 AbstractCegarLoop]: Abstraction has 29851 states and 87279 transitions. [2020-12-17 20:42:42,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:42,305 INFO L276 IsEmpty]: Start isEmpty. Operand 29851 states and 87279 transitions. [2020-12-17 20:42:42,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-17 20:42:42,348 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:42,348 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:42:42,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:42,564 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:42,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:42,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1795867972, now seen corresponding path program 2 times [2020-12-17 20:42:42,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:42,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150240123] [2020-12-17 20:42:42,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-17 20:42:42,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150240123] [2020-12-17 20:42:42,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686928474] [2020-12-17 20:42:42,707 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 [2020-12-17 20:42:42,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:42:42,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:42,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-17 20:42:42,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:42,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:42,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-17 20:42:42,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:42,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-17 20:42:42,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47673192] [2020-12-17 20:42:42,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-17 20:42:42,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:42,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-17 20:42:42,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-17 20:42:42,850 INFO L87 Difference]: Start difference. First operand 29851 states and 87279 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:43,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:43,377 INFO L93 Difference]: Finished difference Result 33691 states and 98543 transitions. [2020-12-17 20:42:43,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-17 20:42:43,378 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2020-12-17 20:42:43,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:43,379 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2020-12-17 20:42:43,379 INFO L78 Accepts]: Start accepts. Automaton has 33691 states and 98543 transitions. Word has length 51 [2020-12-17 20:42:43,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:43,381 INFO L481 AbstractCegarLoop]: Abstraction has 33691 states and 98543 transitions. [2020-12-17 20:42:43,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:43,381 INFO L276 IsEmpty]: Start isEmpty. Operand 33691 states and 98543 transitions. [2020-12-17 20:42:43,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-17 20:42:43,408 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:43,408 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:42:43,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-17 20:42:43,609 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:43,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:43,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1129108430, now seen corresponding path program 3 times [2020-12-17 20:42:43,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:43,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25708859] [2020-12-17 20:42:43,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-17 20:42:43,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25708859] [2020-12-17 20:42:43,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114389507] [2020-12-17 20:42:43,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:43,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-17 20:42:43,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:43,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-17 20:42:43,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:44,037 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:42:44,076 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-17 20:42:44,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:44,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-12-17 20:42:44,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195809585] [2020-12-17 20:42:44,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-17 20:42:44,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:44,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-17 20:42:44,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-17 20:42:44,089 INFO L87 Difference]: Start difference. First operand 33691 states and 98543 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:44,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:44,704 INFO L93 Difference]: Finished difference Result 37531 states and 109743 transitions. [2020-12-17 20:42:44,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-17 20:42:44,705 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2020-12-17 20:42:44,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:44,706 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2020-12-17 20:42:44,706 INFO L78 Accepts]: Start accepts. Automaton has 37531 states and 109743 transitions. Word has length 51 [2020-12-17 20:42:44,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:44,706 INFO L481 AbstractCegarLoop]: Abstraction has 37531 states and 109743 transitions. [2020-12-17 20:42:44,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:44,707 INFO L276 IsEmpty]: Start isEmpty. Operand 37531 states and 109743 transitions. [2020-12-17 20:42:44,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-17 20:42:44,728 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:44,728 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:42:44,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:44,936 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:44,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:44,937 INFO L82 PathProgramCache]: Analyzing trace with hash -194830297, now seen corresponding path program 4 times [2020-12-17 20:42:44,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:44,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718576978] [2020-12-17 20:42:44,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:45,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718576978] [2020-12-17 20:42:45,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532915525] [2020-12-17 20:42:45,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:45,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:42:45,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:45,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:42:45,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:45,159 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:45,171 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:45,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:45,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-17 20:42:45,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949878153] [2020-12-17 20:42:45,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-17 20:42:45,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:45,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-17 20:42:45,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-17 20:42:45,184 INFO L87 Difference]: Start difference. First operand 37531 states and 109743 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:45,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:45,801 INFO L93 Difference]: Finished difference Result 39579 states and 115759 transitions. [2020-12-17 20:42:45,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-17 20:42:45,801 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2020-12-17 20:42:45,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:45,802 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2020-12-17 20:42:45,802 INFO L78 Accepts]: Start accepts. Automaton has 39579 states and 115759 transitions. Word has length 51 [2020-12-17 20:42:45,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:45,803 INFO L481 AbstractCegarLoop]: Abstraction has 39579 states and 115759 transitions. [2020-12-17 20:42:45,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:45,803 INFO L276 IsEmpty]: Start isEmpty. Operand 39579 states and 115759 transitions. [2020-12-17 20:42:45,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-17 20:42:45,854 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:45,854 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:42:46,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:46,068 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:46,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:46,069 INFO L82 PathProgramCache]: Analyzing trace with hash -688928278, now seen corresponding path program 5 times [2020-12-17 20:42:46,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:46,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714901581] [2020-12-17 20:42:46,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:46,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714901581] [2020-12-17 20:42:46,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252489617] [2020-12-17 20:42:46,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:46,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-17 20:42:46,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:46,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:42:46,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:46,362 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:46,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:46,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-12-17 20:42:46,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202329446] [2020-12-17 20:42:46,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-17 20:42:46,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:46,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-17 20:42:46,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-17 20:42:46,375 INFO L87 Difference]: Start difference. First operand 39579 states and 115759 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:46,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:46,996 INFO L93 Difference]: Finished difference Result 44059 states and 128943 transitions. [2020-12-17 20:42:46,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-17 20:42:46,996 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2020-12-17 20:42:46,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:46,997 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2020-12-17 20:42:46,997 INFO L78 Accepts]: Start accepts. Automaton has 44059 states and 128943 transitions. Word has length 56 [2020-12-17 20:42:46,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:46,997 INFO L481 AbstractCegarLoop]: Abstraction has 44059 states and 128943 transitions. [2020-12-17 20:42:46,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:46,997 INFO L276 IsEmpty]: Start isEmpty. Operand 44059 states and 128943 transitions. [2020-12-17 20:42:47,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-17 20:42:47,194 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:47,195 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:42:47,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-17 20:42:47,396 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:47,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:47,397 INFO L82 PathProgramCache]: Analyzing trace with hash -222787652, now seen corresponding path program 6 times [2020-12-17 20:42:47,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:47,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648929021] [2020-12-17 20:42:47,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:47,560 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:47,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648929021] [2020-12-17 20:42:47,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701719823] [2020-12-17 20:42:47,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:47,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-17 20:42:47,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:47,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:42:47,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:47,750 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:42:47,772 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:47,785 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:47,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:47,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-17 20:42:47,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204756006] [2020-12-17 20:42:47,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-17 20:42:47,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:47,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-17 20:42:47,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-12-17 20:42:47,791 INFO L87 Difference]: Start difference. First operand 44059 states and 128943 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:48,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:48,599 INFO L93 Difference]: Finished difference Result 48027 states and 140591 transitions. [2020-12-17 20:42:48,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-17 20:42:48,600 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2020-12-17 20:42:48,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:48,605 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=665, Unknown=0, NotChecked=0, Total=930 [2020-12-17 20:42:48,605 INFO L78 Accepts]: Start accepts. Automaton has 48027 states and 140591 transitions. Word has length 56 [2020-12-17 20:42:48,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:48,605 INFO L481 AbstractCegarLoop]: Abstraction has 48027 states and 140591 transitions. [2020-12-17 20:42:48,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:48,606 INFO L276 IsEmpty]: Start isEmpty. Operand 48027 states and 140591 transitions. [2020-12-17 20:42:48,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-17 20:42:48,656 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:48,656 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:42:48,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-17 20:42:48,871 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:48,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:48,872 INFO L82 PathProgramCache]: Analyzing trace with hash -467361066, now seen corresponding path program 7 times [2020-12-17 20:42:48,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:48,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628975377] [2020-12-17 20:42:48,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:49,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:49,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628975377] [2020-12-17 20:42:49,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839646137] [2020-12-17 20:42:49,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:49,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:42:49,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:49,105 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:49,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:49,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-12-17 20:42:49,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205155451] [2020-12-17 20:42:49,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-17 20:42:49,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:49,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-17 20:42:49,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-17 20:42:49,123 INFO L87 Difference]: Start difference. First operand 48027 states and 140591 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:49,422 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2020-12-17 20:42:49,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:49,891 INFO L93 Difference]: Finished difference Result 58523 states and 171311 transitions. [2020-12-17 20:42:49,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-17 20:42:49,891 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2020-12-17 20:42:49,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:49,892 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=539, Unknown=0, NotChecked=0, Total=756 [2020-12-17 20:42:49,892 INFO L78 Accepts]: Start accepts. Automaton has 58523 states and 171311 transitions. Word has length 56 [2020-12-17 20:42:49,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:49,894 INFO L481 AbstractCegarLoop]: Abstraction has 58523 states and 171311 transitions. [2020-12-17 20:42:49,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:49,894 INFO L276 IsEmpty]: Start isEmpty. Operand 58523 states and 171311 transitions. [2020-12-17 20:42:50,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-17 20:42:50,221 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:50,221 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:42:50,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-17 20:42:50,427 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:50,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:50,428 INFO L82 PathProgramCache]: Analyzing trace with hash 452241830, now seen corresponding path program 8 times [2020-12-17 20:42:50,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:50,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787189146] [2020-12-17 20:42:50,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:50,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:50,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787189146] [2020-12-17 20:42:50,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212304167] [2020-12-17 20:42:50,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:50,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:42:50,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:50,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:42:50,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:50,704 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:42:50,728 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:50,748 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:50,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:50,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-17 20:42:50,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283464153] [2020-12-17 20:42:50,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-17 20:42:50,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:50,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-17 20:42:50,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-12-17 20:42:50,752 INFO L87 Difference]: Start difference. First operand 58523 states and 171311 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:51,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:51,741 INFO L93 Difference]: Finished difference Result 63259 states and 185135 transitions. [2020-12-17 20:42:51,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-17 20:42:51,742 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2020-12-17 20:42:51,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:51,743 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2020-12-17 20:42:51,743 INFO L78 Accepts]: Start accepts. Automaton has 63259 states and 185135 transitions. Word has length 56 [2020-12-17 20:42:51,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:51,744 INFO L481 AbstractCegarLoop]: Abstraction has 63259 states and 185135 transitions. [2020-12-17 20:42:51,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:51,744 INFO L276 IsEmpty]: Start isEmpty. Operand 63259 states and 185135 transitions. [2020-12-17 20:42:51,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-17 20:42:51,790 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:51,790 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:42:51,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-17 20:42:51,991 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:51,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:51,993 INFO L82 PathProgramCache]: Analyzing trace with hash 804317748, now seen corresponding path program 9 times [2020-12-17 20:42:51,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:51,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901523788] [2020-12-17 20:42:51,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:52,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901523788] [2020-12-17 20:42:52,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469008701] [2020-12-17 20:42:52,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:52,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-17 20:42:52,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:52,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:42:52,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:52,263 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:52,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:52,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-12-17 20:42:52,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557230878] [2020-12-17 20:42:52,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-17 20:42:52,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:52,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-17 20:42:52,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-17 20:42:52,294 INFO L87 Difference]: Start difference. First operand 63259 states and 185135 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:53,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:53,173 INFO L93 Difference]: Finished difference Result 68123 states and 199407 transitions. [2020-12-17 20:42:53,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-17 20:42:53,174 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2020-12-17 20:42:53,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:53,174 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-17 20:42:53,175 INFO L78 Accepts]: Start accepts. Automaton has 68123 states and 199407 transitions. Word has length 56 [2020-12-17 20:42:53,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:53,175 INFO L481 AbstractCegarLoop]: Abstraction has 68123 states and 199407 transitions. [2020-12-17 20:42:53,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:53,175 INFO L276 IsEmpty]: Start isEmpty. Operand 68123 states and 199407 transitions. [2020-12-17 20:42:53,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-17 20:42:53,208 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:53,209 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:42:53,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-17 20:42:53,414 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:53,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:53,415 INFO L82 PathProgramCache]: Analyzing trace with hash 801344518, now seen corresponding path program 10 times [2020-12-17 20:42:53,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:53,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923287020] [2020-12-17 20:42:53,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:53,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923287020] [2020-12-17 20:42:53,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141413305] [2020-12-17 20:42:53,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:53,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:42:53,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:53,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-17 20:42:53,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:53,657 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:42:53,681 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:53,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:53,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-12-17 20:42:53,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034447642] [2020-12-17 20:42:53,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-17 20:42:53,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:53,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-17 20:42:53,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-12-17 20:42:53,692 INFO L87 Difference]: Start difference. First operand 68123 states and 199407 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:54,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:54,846 INFO L93 Difference]: Finished difference Result 69467 states and 203247 transitions. [2020-12-17 20:42:54,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-17 20:42:54,847 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2020-12-17 20:42:54,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:54,847 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2020-12-17 20:42:54,847 INFO L78 Accepts]: Start accepts. Automaton has 69467 states and 203247 transitions. Word has length 56 [2020-12-17 20:42:54,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:54,848 INFO L481 AbstractCegarLoop]: Abstraction has 69467 states and 203247 transitions. [2020-12-17 20:42:54,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:54,848 INFO L276 IsEmpty]: Start isEmpty. Operand 69467 states and 203247 transitions. [2020-12-17 20:42:55,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-17 20:42:55,102 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:55,102 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:42:55,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:55,303 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:55,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:55,304 INFO L82 PathProgramCache]: Analyzing trace with hash 548080699, now seen corresponding path program 11 times [2020-12-17 20:42:55,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:55,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264043119] [2020-12-17 20:42:55,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:55,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:55,470 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:55,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264043119] [2020-12-17 20:42:55,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55063590] [2020-12-17 20:42:55,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:55,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-17 20:42:55,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:55,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:42:55,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:55,555 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:55,569 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:55,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:55,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-12-17 20:42:55,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993774549] [2020-12-17 20:42:55,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-17 20:42:55,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:55,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-17 20:42:55,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-12-17 20:42:55,572 INFO L87 Difference]: Start difference. First operand 69467 states and 203247 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:56,103 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-12-17 20:42:56,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:56,314 INFO L93 Difference]: Finished difference Result 73179 states and 214127 transitions. [2020-12-17 20:42:56,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-17 20:42:56,315 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2020-12-17 20:42:56,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:56,315 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=525, Unknown=0, NotChecked=0, Total=756 [2020-12-17 20:42:56,316 INFO L78 Accepts]: Start accepts. Automaton has 73179 states and 214127 transitions. Word has length 61 [2020-12-17 20:42:56,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:56,316 INFO L481 AbstractCegarLoop]: Abstraction has 73179 states and 214127 transitions. [2020-12-17 20:42:56,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:56,316 INFO L276 IsEmpty]: Start isEmpty. Operand 73179 states and 214127 transitions. [2020-12-17 20:42:56,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-17 20:42:56,382 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:56,383 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:42:56,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:56,591 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:56,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:56,593 INFO L82 PathProgramCache]: Analyzing trace with hash 503720845, now seen corresponding path program 12 times [2020-12-17 20:42:56,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:56,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617612307] [2020-12-17 20:42:56,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:56,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617612307] [2020-12-17 20:42:56,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852771716] [2020-12-17 20:42:56,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:56,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-17 20:42:56,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:42:56,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:42:56,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:56,879 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:42:56,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:56,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:56,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-17 20:42:56,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590464982] [2020-12-17 20:42:56,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-17 20:42:56,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:56,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-17 20:42:56,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-12-17 20:42:56,915 INFO L87 Difference]: Start difference. First operand 73179 states and 214127 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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) [2020-12-17 20:42:57,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:57,919 INFO L93 Difference]: Finished difference Result 76635 states and 224239 transitions. [2020-12-17 20:42:57,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-17 20:42:57,919 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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 61 [2020-12-17 20:42:57,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:57,920 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2020-12-17 20:42:57,920 INFO L78 Accepts]: Start accepts. Automaton has 76635 states and 224239 transitions. Word has length 61 [2020-12-17 20:42:57,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:57,920 INFO L481 AbstractCegarLoop]: Abstraction has 76635 states and 224239 transitions. [2020-12-17 20:42:57,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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) [2020-12-17 20:42:57,920 INFO L276 IsEmpty]: Start isEmpty. Operand 76635 states and 224239 transitions. [2020-12-17 20:42:57,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-17 20:42:57,977 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:57,977 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:42:58,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-17 20:42:58,178 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:58,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:58,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1988537895, now seen corresponding path program 13 times [2020-12-17 20:42:58,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:58,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940436242] [2020-12-17 20:42:58,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:58,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940436242] [2020-12-17 20:42:58,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385759017] [2020-12-17 20:42:58,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:58,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:42:58,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:42:58,420 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:42:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:58,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:42:58,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-12-17 20:42:58,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158776952] [2020-12-17 20:42:58,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-17 20:42:58,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:42:58,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-17 20:42:58,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-12-17 20:42:58,432 INFO L87 Difference]: Start difference. First operand 76635 states and 224239 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:59,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:42:59,513 INFO L93 Difference]: Finished difference Result 80219 states and 234735 transitions. [2020-12-17 20:42:59,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-17 20:42:59,514 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2020-12-17 20:42:59,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:42:59,514 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=267, Invalid=725, Unknown=0, NotChecked=0, Total=992 [2020-12-17 20:42:59,515 INFO L78 Accepts]: Start accepts. Automaton has 80219 states and 234735 transitions. Word has length 61 [2020-12-17 20:42:59,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:42:59,515 INFO L481 AbstractCegarLoop]: Abstraction has 80219 states and 234735 transitions. [2020-12-17 20:42:59,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:42:59,515 INFO L276 IsEmpty]: Start isEmpty. Operand 80219 states and 234735 transitions. [2020-12-17 20:42:59,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-17 20:42:59,566 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:42:59,566 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:42:59,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:42:59,773 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:42:59,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:42:59,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1084722953, now seen corresponding path program 14 times [2020-12-17 20:42:59,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:42:59,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825628064] [2020-12-17 20:42:59,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:42:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:42:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:42:59,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825628064] [2020-12-17 20:42:59,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496177402] [2020-12-17 20:42:59,941 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 [2020-12-17 20:43:00,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:43:00,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:00,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:43:00,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:00,085 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:43:00,111 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:00,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:00,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-17 20:43:00,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560827147] [2020-12-17 20:43:00,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-17 20:43:00,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:00,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-17 20:43:00,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-12-17 20:43:00,133 INFO L87 Difference]: Start difference. First operand 80219 states and 234735 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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) [2020-12-17 20:43:01,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:01,246 INFO L93 Difference]: Finished difference Result 91147 states and 266695 transitions. [2020-12-17 20:43:01,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-17 20:43:01,247 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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 61 [2020-12-17 20:43:01,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:01,248 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-12-17 20:43:01,248 INFO L78 Accepts]: Start accepts. Automaton has 91147 states and 266695 transitions. Word has length 61 [2020-12-17 20:43:01,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:01,248 INFO L481 AbstractCegarLoop]: Abstraction has 91147 states and 266695 transitions. [2020-12-17 20:43:01,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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) [2020-12-17 20:43:01,248 INFO L276 IsEmpty]: Start isEmpty. Operand 91147 states and 266695 transitions. [2020-12-17 20:43:01,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-17 20:43:01,312 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:01,312 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:01,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-17 20:43:01,513 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:01,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:01,514 INFO L82 PathProgramCache]: Analyzing trace with hash 2120210981, now seen corresponding path program 15 times [2020-12-17 20:43:01,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:01,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026058359] [2020-12-17 20:43:01,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:01,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:01,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026058359] [2020-12-17 20:43:01,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544760606] [2020-12-17 20:43:01,657 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 [2020-12-17 20:43:01,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-17 20:43:01,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:01,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:43:01,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:01,773 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:01,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:01,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-12-17 20:43:01,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308486710] [2020-12-17 20:43:01,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-17 20:43:01,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:01,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-17 20:43:01,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-12-17 20:43:01,789 INFO L87 Difference]: Start difference. First operand 91147 states and 266695 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:03,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:03,189 INFO L93 Difference]: Finished difference Result 95371 states and 279047 transitions. [2020-12-17 20:43:03,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-17 20:43:03,190 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2020-12-17 20:43:03,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:03,191 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2020-12-17 20:43:03,191 INFO L78 Accepts]: Start accepts. Automaton has 95371 states and 279047 transitions. Word has length 61 [2020-12-17 20:43:03,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:03,191 INFO L481 AbstractCegarLoop]: Abstraction has 95371 states and 279047 transitions. [2020-12-17 20:43:03,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:03,192 INFO L276 IsEmpty]: Start isEmpty. Operand 95371 states and 279047 transitions. [2020-12-17 20:43:03,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-17 20:43:03,272 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:03,272 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:03,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-17 20:43:03,473 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:03,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:03,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1255153419, now seen corresponding path program 16 times [2020-12-17 20:43:03,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:03,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926205865] [2020-12-17 20:43:03,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:03,628 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:03,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926205865] [2020-12-17 20:43:03,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859618563] [2020-12-17 20:43:03,628 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 [2020-12-17 20:43:03,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:43:03,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:03,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:43:03,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:03,732 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:43:03,755 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:03,767 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:03,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:03,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-17 20:43:03,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133384550] [2020-12-17 20:43:03,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-17 20:43:03,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:03,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-17 20:43:03,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-12-17 20:43:03,770 INFO L87 Difference]: Start difference. First operand 95371 states and 279047 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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) [2020-12-17 20:43:05,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:05,144 INFO L93 Difference]: Finished difference Result 100491 states and 293959 transitions. [2020-12-17 20:43:05,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-17 20:43:05,145 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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 61 [2020-12-17 20:43:05,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:05,146 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=372, Invalid=960, Unknown=0, NotChecked=0, Total=1332 [2020-12-17 20:43:05,146 INFO L78 Accepts]: Start accepts. Automaton has 100491 states and 293959 transitions. Word has length 61 [2020-12-17 20:43:05,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:05,146 INFO L481 AbstractCegarLoop]: Abstraction has 100491 states and 293959 transitions. [2020-12-17 20:43:05,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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) [2020-12-17 20:43:05,146 INFO L276 IsEmpty]: Start isEmpty. Operand 100491 states and 293959 transitions. [2020-12-17 20:43:05,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-17 20:43:05,211 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:05,211 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:05,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-17 20:43:05,412 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:05,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:05,413 INFO L82 PathProgramCache]: Analyzing trace with hash -903077501, now seen corresponding path program 17 times [2020-12-17 20:43:05,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:05,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803440041] [2020-12-17 20:43:05,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:05,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803440041] [2020-12-17 20:43:05,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259793429] [2020-12-17 20:43:05,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:05,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-17 20:43:05,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:05,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:43:05,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:05,646 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:05,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:05,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-12-17 20:43:05,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114557269] [2020-12-17 20:43:05,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-17 20:43:05,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:05,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-17 20:43:05,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-12-17 20:43:05,655 INFO L87 Difference]: Start difference. First operand 100491 states and 293959 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:06,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:06,922 INFO L93 Difference]: Finished difference Result 103755 states and 303559 transitions. [2020-12-17 20:43:06,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-17 20:43:06,922 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2020-12-17 20:43:06,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:06,923 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=926, Unknown=0, NotChecked=0, Total=1332 [2020-12-17 20:43:06,923 INFO L78 Accepts]: Start accepts. Automaton has 103755 states and 303559 transitions. Word has length 61 [2020-12-17 20:43:06,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:06,923 INFO L481 AbstractCegarLoop]: Abstraction has 103755 states and 303559 transitions. [2020-12-17 20:43:06,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:06,924 INFO L276 IsEmpty]: Start isEmpty. Operand 103755 states and 303559 transitions. [2020-12-17 20:43:06,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-17 20:43:06,990 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:06,990 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:07,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-17 20:43:07,192 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:07,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:07,193 INFO L82 PathProgramCache]: Analyzing trace with hash -906050731, now seen corresponding path program 18 times [2020-12-17 20:43:07,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:07,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657747624] [2020-12-17 20:43:07,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:07,347 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:07,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657747624] [2020-12-17 20:43:07,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000475831] [2020-12-17 20:43:07,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:07,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-17 20:43:07,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:07,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:43:07,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:07,455 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:43:07,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:07,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:07,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-12-17 20:43:07,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679573537] [2020-12-17 20:43:07,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:43:07,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:07,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:43:07,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:43:07,494 INFO L87 Difference]: Start difference. First operand 103755 states and 303559 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:08,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:08,993 INFO L93 Difference]: Finished difference Result 107467 states and 314311 transitions. [2020-12-17 20:43:08,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-17 20:43:08,994 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2020-12-17 20:43:08,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:08,995 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=490, Invalid=1232, Unknown=0, NotChecked=0, Total=1722 [2020-12-17 20:43:08,995 INFO L78 Accepts]: Start accepts. Automaton has 107467 states and 314311 transitions. Word has length 61 [2020-12-17 20:43:08,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:08,995 INFO L481 AbstractCegarLoop]: Abstraction has 107467 states and 314311 transitions. [2020-12-17 20:43:08,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:08,995 INFO L276 IsEmpty]: Start isEmpty. Operand 107467 states and 314311 transitions. [2020-12-17 20:43:09,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-17 20:43:09,074 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:09,075 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:09,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-17 20:43:09,276 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:09,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:09,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1591649445, now seen corresponding path program 19 times [2020-12-17 20:43:09,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:09,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867722430] [2020-12-17 20:43:09,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:09,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867722430] [2020-12-17 20:43:09,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214756838] [2020-12-17 20:43:09,449 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:09,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-17 20:43:09,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:09,552 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:09,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:09,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-12-17 20:43:09,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303803962] [2020-12-17 20:43:09,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-17 20:43:09,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:09,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-17 20:43:09,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-12-17 20:43:09,910 INFO L87 Difference]: Start difference. First operand 107467 states and 314311 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:10,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:10,819 INFO L93 Difference]: Finished difference Result 110475 states and 323207 transitions. [2020-12-17 20:43:10,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-17 20:43:10,820 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-12-17 20:43:10,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:10,821 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=288, Invalid=704, Unknown=0, NotChecked=0, Total=992 [2020-12-17 20:43:10,821 INFO L78 Accepts]: Start accepts. Automaton has 110475 states and 323207 transitions. Word has length 66 [2020-12-17 20:43:10,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:10,821 INFO L481 AbstractCegarLoop]: Abstraction has 110475 states and 323207 transitions. [2020-12-17 20:43:10,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:10,822 INFO L276 IsEmpty]: Start isEmpty. Operand 110475 states and 323207 transitions. [2020-12-17 20:43:10,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-17 20:43:10,920 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:10,920 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:11,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:11,129 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:11,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:11,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1636009299, now seen corresponding path program 20 times [2020-12-17 20:43:11,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:11,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50240119] [2020-12-17 20:43:11,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:11,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50240119] [2020-12-17 20:43:11,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55011298] [2020-12-17 20:43:11,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:11,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:43:11,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:11,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-17 20:43:11,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:11,451 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:43:11,474 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:11,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:11,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-17 20:43:11,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099279693] [2020-12-17 20:43:11,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:43:11,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:11,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:43:11,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:43:11,486 INFO L87 Difference]: Start difference. First operand 110475 states and 323207 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:12,273 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-12-17 20:43:12,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:12,884 INFO L93 Difference]: Finished difference Result 112459 states and 329031 transitions. [2020-12-17 20:43:12,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-17 20:43:12,884 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-12-17 20:43:12,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:12,885 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=373, Invalid=959, Unknown=0, NotChecked=0, Total=1332 [2020-12-17 20:43:12,885 INFO L78 Accepts]: Start accepts. Automaton has 112459 states and 329031 transitions. Word has length 66 [2020-12-17 20:43:12,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:12,886 INFO L481 AbstractCegarLoop]: Abstraction has 112459 states and 329031 transitions. [2020-12-17 20:43:12,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:12,886 INFO L276 IsEmpty]: Start isEmpty. Operand 112459 states and 329031 transitions. [2020-12-17 20:43:12,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-17 20:43:12,968 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:12,969 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:13,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-17 20:43:13,183 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:13,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:13,184 INFO L82 PathProgramCache]: Analyzing trace with hash -151192249, now seen corresponding path program 21 times [2020-12-17 20:43:13,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:13,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322977863] [2020-12-17 20:43:13,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:13,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322977863] [2020-12-17 20:43:13,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026650758] [2020-12-17 20:43:13,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:13,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-17 20:43:13,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:13,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-17 20:43:13,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:13,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:13,447 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:13,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:13,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-12-17 20:43:13,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096729214] [2020-12-17 20:43:13,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-17 20:43:13,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:13,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-17 20:43:13,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-12-17 20:43:13,449 INFO L87 Difference]: Start difference. First operand 112459 states and 329031 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:14,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:14,705 INFO L93 Difference]: Finished difference Result 114571 states and 335239 transitions. [2020-12-17 20:43:14,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-17 20:43:14,706 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-12-17 20:43:14,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:14,706 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=313, Invalid=809, Unknown=0, NotChecked=0, Total=1122 [2020-12-17 20:43:14,707 INFO L78 Accepts]: Start accepts. Automaton has 114571 states and 335239 transitions. Word has length 66 [2020-12-17 20:43:14,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:14,707 INFO L481 AbstractCegarLoop]: Abstraction has 114571 states and 335239 transitions. [2020-12-17 20:43:14,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:14,707 INFO L276 IsEmpty]: Start isEmpty. Operand 114571 states and 335239 transitions. [2020-12-17 20:43:14,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-17 20:43:14,786 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:14,786 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:14,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:14,987 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:14,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:14,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1070514199, now seen corresponding path program 22 times [2020-12-17 20:43:14,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:14,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108866182] [2020-12-17 20:43:14,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:15,180 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:15,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108866182] [2020-12-17 20:43:15,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348581279] [2020-12-17 20:43:15,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:15,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:43:15,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:15,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:43:15,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:15,277 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:43:15,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:15,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:15,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-17 20:43:15,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387885927] [2020-12-17 20:43:15,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:43:15,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:15,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:43:15,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:43:15,306 INFO L87 Difference]: Start difference. First operand 114571 states and 335239 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:16,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:16,790 INFO L93 Difference]: Finished difference Result 116427 states and 340679 transitions. [2020-12-17 20:43:16,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-17 20:43:16,791 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-12-17 20:43:16,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:16,792 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=406, Invalid=1076, Unknown=0, NotChecked=0, Total=1482 [2020-12-17 20:43:16,792 INFO L78 Accepts]: Start accepts. Automaton has 116427 states and 340679 transitions. Word has length 66 [2020-12-17 20:43:16,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:16,792 INFO L481 AbstractCegarLoop]: Abstraction has 116427 states and 340679 transitions. [2020-12-17 20:43:16,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:16,792 INFO L276 IsEmpty]: Start isEmpty. Operand 116427 states and 340679 transitions. [2020-12-17 20:43:16,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-17 20:43:16,873 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:16,873 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:17,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-17 20:43:17,079 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:17,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:17,080 INFO L82 PathProgramCache]: Analyzing trace with hash -19519163, now seen corresponding path program 23 times [2020-12-17 20:43:17,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:17,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977285613] [2020-12-17 20:43:17,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:17,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977285613] [2020-12-17 20:43:17,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994997806] [2020-12-17 20:43:17,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-17 20:43:17,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-17 20:43:17,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:17,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-17 20:43:17,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:17,345 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:17,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:17,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-12-17 20:43:17,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000177569] [2020-12-17 20:43:17,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-17 20:43:17,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:17,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-17 20:43:17,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-12-17 20:43:17,358 INFO L87 Difference]: Start difference. First operand 116427 states and 340679 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:18,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:18,750 INFO L93 Difference]: Finished difference Result 118283 states and 346119 transitions. [2020-12-17 20:43:18,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-17 20:43:18,750 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-12-17 20:43:18,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:18,751 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2020-12-17 20:43:18,751 INFO L78 Accepts]: Start accepts. Automaton has 118283 states and 346119 transitions. Word has length 66 [2020-12-17 20:43:18,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:18,752 INFO L481 AbstractCegarLoop]: Abstraction has 118283 states and 346119 transitions. [2020-12-17 20:43:18,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:18,752 INFO L276 IsEmpty]: Start isEmpty. Operand 118283 states and 346119 transitions. [2020-12-17 20:43:18,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-17 20:43:18,857 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:18,857 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:19,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:19,058 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:19,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:19,059 INFO L82 PathProgramCache]: Analyzing trace with hash 900083733, now seen corresponding path program 24 times [2020-12-17 20:43:19,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:19,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699885640] [2020-12-17 20:43:19,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:19,248 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:19,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699885640] [2020-12-17 20:43:19,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714195423] [2020-12-17 20:43:19,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:19,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-17 20:43:19,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:19,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-17 20:43:19,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:19,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:43:19,383 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:19,393 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:19,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:19,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-17 20:43:19,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977134579] [2020-12-17 20:43:19,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:43:19,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:19,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:43:19,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:43:19,395 INFO L87 Difference]: Start difference. First operand 118283 states and 346119 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:21,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:21,150 INFO L93 Difference]: Finished difference Result 121163 states and 354503 transitions. [2020-12-17 20:43:21,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-17 20:43:21,150 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-12-17 20:43:21,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:21,151 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=1181, Unknown=0, NotChecked=0, Total=1640 [2020-12-17 20:43:21,151 INFO L78 Accepts]: Start accepts. Automaton has 121163 states and 354503 transitions. Word has length 66 [2020-12-17 20:43:21,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:21,152 INFO L481 AbstractCegarLoop]: Abstraction has 121163 states and 354503 transitions. [2020-12-17 20:43:21,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:21,152 INFO L276 IsEmpty]: Start isEmpty. Operand 121163 states and 354503 transitions. [2020-12-17 20:43:21,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-17 20:43:21,241 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:21,241 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:21,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-17 20:43:21,442 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:21,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:21,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1252159651, now seen corresponding path program 25 times [2020-12-17 20:43:21,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:21,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872376270] [2020-12-17 20:43:21,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:21,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872376270] [2020-12-17 20:43:21,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430140407] [2020-12-17 20:43:21,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:21,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-17 20:43:21,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:21,672 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:21,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:21,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-12-17 20:43:21,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368579405] [2020-12-17 20:43:21,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-17 20:43:21,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:21,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-17 20:43:21,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-12-17 20:43:21,682 INFO L87 Difference]: Start difference. First operand 121163 states and 354503 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:23,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:23,260 INFO L93 Difference]: Finished difference Result 124427 states and 364103 transitions. [2020-12-17 20:43:23,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-17 20:43:23,260 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-12-17 20:43:23,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:23,261 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=423, Invalid=983, Unknown=0, NotChecked=0, Total=1406 [2020-12-17 20:43:23,261 INFO L78 Accepts]: Start accepts. Automaton has 124427 states and 364103 transitions. Word has length 66 [2020-12-17 20:43:23,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:23,261 INFO L481 AbstractCegarLoop]: Abstraction has 124427 states and 364103 transitions. [2020-12-17 20:43:23,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:23,262 INFO L276 IsEmpty]: Start isEmpty. Operand 124427 states and 364103 transitions. [2020-12-17 20:43:23,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-17 20:43:23,334 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:23,334 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:23,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:23,535 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:23,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:23,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1249186421, now seen corresponding path program 26 times [2020-12-17 20:43:23,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:23,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8685170] [2020-12-17 20:43:23,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:23,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8685170] [2020-12-17 20:43:23,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73526174] [2020-12-17 20:43:23,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:23,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:43:23,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:23,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-17 20:43:23,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:23,815 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:43:23,838 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:23,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:23,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-12-17 20:43:23,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149049045] [2020-12-17 20:43:23,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:43:23,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:23,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:43:23,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:43:23,847 INFO L87 Difference]: Start difference. First operand 124427 states and 364103 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:25,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:25,722 INFO L93 Difference]: Finished difference Result 125771 states and 367943 transitions. [2020-12-17 20:43:25,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-17 20:43:25,723 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-12-17 20:43:25,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:25,724 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=591, Invalid=1479, Unknown=0, NotChecked=0, Total=2070 [2020-12-17 20:43:25,724 INFO L78 Accepts]: Start accepts. Automaton has 125771 states and 367943 transitions. Word has length 66 [2020-12-17 20:43:25,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:25,725 INFO L481 AbstractCegarLoop]: Abstraction has 125771 states and 367943 transitions. [2020-12-17 20:43:25,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:25,725 INFO L276 IsEmpty]: Start isEmpty. Operand 125771 states and 367943 transitions. [2020-12-17 20:43:25,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:43:25,883 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:25,883 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:26,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-17 20:43:26,084 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:26,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:26,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1334750316, now seen corresponding path program 27 times [2020-12-17 20:43:26,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:26,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518400509] [2020-12-17 20:43:26,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:26,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518400509] [2020-12-17 20:43:26,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020067038] [2020-12-17 20:43:26,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:26,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-17 20:43:26,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:26,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:43:26,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:26,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:26,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:26,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-17 20:43:26,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081423981] [2020-12-17 20:43:26,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:43:26,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:26,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:43:26,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:43:26,378 INFO L87 Difference]: Start difference. First operand 125771 states and 367943 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:27,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:27,880 INFO L93 Difference]: Finished difference Result 128139 states and 374919 transitions. [2020-12-17 20:43:27,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-17 20:43:27,880 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-12-17 20:43:27,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:27,881 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2020-12-17 20:43:27,882 INFO L78 Accepts]: Start accepts. Automaton has 128139 states and 374919 transitions. Word has length 71 [2020-12-17 20:43:27,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:27,883 INFO L481 AbstractCegarLoop]: Abstraction has 128139 states and 374919 transitions. [2020-12-17 20:43:27,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:27,883 INFO L276 IsEmpty]: Start isEmpty. Operand 128139 states and 374919 transitions. [2020-12-17 20:43:28,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:43:28,032 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:28,032 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:28,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:28,233 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:28,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:28,234 INFO L82 PathProgramCache]: Analyzing trace with hash -99594946, now seen corresponding path program 28 times [2020-12-17 20:43:28,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:28,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195982187] [2020-12-17 20:43:28,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:28,461 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:28,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195982187] [2020-12-17 20:43:28,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386838620] [2020-12-17 20:43:28,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:28,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:43:28,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:28,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:43:28,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:28,568 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:43:28,586 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:28,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:28,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-17 20:43:28,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408533113] [2020-12-17 20:43:28,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:43:28,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:28,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:43:28,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:43:28,604 INFO L87 Difference]: Start difference. First operand 128139 states and 374919 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:29,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:29,764 INFO L93 Difference]: Finished difference Result 130379 states and 381511 transitions. [2020-12-17 20:43:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-17 20:43:29,764 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-12-17 20:43:29,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:29,765 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=1028, Unknown=0, NotChecked=0, Total=1406 [2020-12-17 20:43:29,765 INFO L78 Accepts]: Start accepts. Automaton has 130379 states and 381511 transitions. Word has length 71 [2020-12-17 20:43:29,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:29,766 INFO L481 AbstractCegarLoop]: Abstraction has 130379 states and 381511 transitions. [2020-12-17 20:43:29,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:29,766 INFO L276 IsEmpty]: Start isEmpty. Operand 130379 states and 381511 transitions. [2020-12-17 20:43:30,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:43:30,589 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:30,589 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:30,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-17 20:43:30,806 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:30,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:30,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1726601048, now seen corresponding path program 29 times [2020-12-17 20:43:30,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:30,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266375290] [2020-12-17 20:43:30,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:30,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266375290] [2020-12-17 20:43:30,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791547173] [2020-12-17 20:43:30,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:31,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-17 20:43:31,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:31,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:43:31,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:31,092 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:31,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:31,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-17 20:43:31,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796312380] [2020-12-17 20:43:31,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:43:31,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:31,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:43:31,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:43:31,111 INFO L87 Difference]: Start difference. First operand 130379 states and 381511 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:32,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:32,123 INFO L93 Difference]: Finished difference Result 132747 states and 388487 transitions. [2020-12-17 20:43:32,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-17 20:43:32,124 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-12-17 20:43:32,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:32,124 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2020-12-17 20:43:32,125 INFO L78 Accepts]: Start accepts. Automaton has 132747 states and 388487 transitions. Word has length 71 [2020-12-17 20:43:32,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:32,125 INFO L481 AbstractCegarLoop]: Abstraction has 132747 states and 388487 transitions. [2020-12-17 20:43:32,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:32,125 INFO L276 IsEmpty]: Start isEmpty. Operand 132747 states and 388487 transitions. [2020-12-17 20:43:32,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:43:32,233 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:32,233 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:32,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-17 20:43:32,434 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:32,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:32,435 INFO L82 PathProgramCache]: Analyzing trace with hash -406694360, now seen corresponding path program 30 times [2020-12-17 20:43:32,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:32,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559557335] [2020-12-17 20:43:32,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:33,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559557335] [2020-12-17 20:43:33,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194793046] [2020-12-17 20:43:33,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:33,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-17 20:43:33,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:33,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:43:33,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:33,598 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:43:33,618 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:33,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:33,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-17 20:43:33,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112095572] [2020-12-17 20:43:33,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:43:33,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:33,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:43:33,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:43:33,630 INFO L87 Difference]: Start difference. First operand 132747 states and 388487 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:34,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:34,821 INFO L93 Difference]: Finished difference Result 136331 states and 398983 transitions. [2020-12-17 20:43:34,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-17 20:43:34,822 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-12-17 20:43:34,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:34,823 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2020-12-17 20:43:34,823 INFO L78 Accepts]: Start accepts. Automaton has 136331 states and 398983 transitions. Word has length 71 [2020-12-17 20:43:34,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:34,824 INFO L481 AbstractCegarLoop]: Abstraction has 136331 states and 398983 transitions. [2020-12-17 20:43:34,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:34,824 INFO L276 IsEmpty]: Start isEmpty. Operand 136331 states and 398983 transitions. [2020-12-17 20:43:34,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:43:34,935 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:34,936 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:35,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-17 20:43:35,136 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:35,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:35,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1483906518, now seen corresponding path program 31 times [2020-12-17 20:43:35,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:35,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401168763] [2020-12-17 20:43:35,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:35,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401168763] [2020-12-17 20:43:35,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871053213] [2020-12-17 20:43:35,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:35,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:43:35,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:35,411 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:35,991 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:35,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:35,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-17 20:43:35,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364145406] [2020-12-17 20:43:35,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:43:35,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:35,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:43:35,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:43:35,993 INFO L87 Difference]: Start difference. First operand 136331 states and 398983 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:37,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:37,164 INFO L93 Difference]: Finished difference Result 138443 states and 405191 transitions. [2020-12-17 20:43:37,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-17 20:43:37,165 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-12-17 20:43:37,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:37,166 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=458, Invalid=1182, Unknown=0, NotChecked=0, Total=1640 [2020-12-17 20:43:37,166 INFO L78 Accepts]: Start accepts. Automaton has 138443 states and 405191 transitions. Word has length 71 [2020-12-17 20:43:37,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:37,166 INFO L481 AbstractCegarLoop]: Abstraction has 138443 states and 405191 transitions. [2020-12-17 20:43:37,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:37,166 INFO L276 IsEmpty]: Start isEmpty. Operand 138443 states and 405191 transitions. [2020-12-17 20:43:37,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:43:37,276 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:37,276 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:37,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-17 20:43:37,477 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:37,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:37,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1589354330, now seen corresponding path program 32 times [2020-12-17 20:43:37,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:37,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936113438] [2020-12-17 20:43:37,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:37,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:37,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936113438] [2020-12-17 20:43:37,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455481151] [2020-12-17 20:43:37,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:37,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:43:37,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:37,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:43:37,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:37,751 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:43:37,767 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:37,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:37,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-17 20:43:37,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957815512] [2020-12-17 20:43:37,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:43:37,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:37,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:43:37,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:43:37,778 INFO L87 Difference]: Start difference. First operand 138443 states and 405191 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:38,680 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 13 [2020-12-17 20:43:39,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:39,824 INFO L93 Difference]: Finished difference Result 140171 states and 410247 transitions. [2020-12-17 20:43:39,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-17 20:43:39,825 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-12-17 20:43:39,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:39,826 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=488, Invalid=1318, Unknown=0, NotChecked=0, Total=1806 [2020-12-17 20:43:39,826 INFO L78 Accepts]: Start accepts. Automaton has 140171 states and 410247 transitions. Word has length 71 [2020-12-17 20:43:39,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:39,826 INFO L481 AbstractCegarLoop]: Abstraction has 140171 states and 410247 transitions. [2020-12-17 20:43:39,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:39,827 INFO L276 IsEmpty]: Start isEmpty. Operand 140171 states and 410247 transitions. [2020-12-17 20:43:39,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:43:39,965 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:39,966 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:40,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:40,167 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:40,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:40,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1615579604, now seen corresponding path program 33 times [2020-12-17 20:43:40,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:40,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143053950] [2020-12-17 20:43:40,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:40,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143053950] [2020-12-17 20:43:40,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299378058] [2020-12-17 20:43:40,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:40,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-17 20:43:40,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:40,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:43:40,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:40,468 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:40,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:40,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-17 20:43:40,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279646211] [2020-12-17 20:43:40,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:43:40,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:40,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:43:40,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:43:40,479 INFO L87 Difference]: Start difference. First operand 140171 states and 410247 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:42,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:42,295 INFO L93 Difference]: Finished difference Result 142027 states and 415687 transitions. [2020-12-17 20:43:42,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-17 20:43:42,295 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-12-17 20:43:42,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:42,296 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=520, Invalid=1286, Unknown=0, NotChecked=0, Total=1806 [2020-12-17 20:43:42,296 INFO L78 Accepts]: Start accepts. Automaton has 142027 states and 415687 transitions. Word has length 71 [2020-12-17 20:43:42,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:42,297 INFO L481 AbstractCegarLoop]: Abstraction has 142027 states and 415687 transitions. [2020-12-17 20:43:42,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:42,297 INFO L276 IsEmpty]: Start isEmpty. Operand 142027 states and 415687 transitions. [2020-12-17 20:43:42,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:43:42,415 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:42,415 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:42,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-17 20:43:42,616 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:42,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:42,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1759784796, now seen corresponding path program 34 times [2020-12-17 20:43:42,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:42,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240410048] [2020-12-17 20:43:42,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:42,805 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:42,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240410048] [2020-12-17 20:43:42,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817384964] [2020-12-17 20:43:42,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:42,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:43:42,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:42,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-17 20:43:42,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:42,903 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:43:42,916 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:42,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:42,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-17 20:43:42,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945719224] [2020-12-17 20:43:42,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:43:42,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:42,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:43:42,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:43:42,927 INFO L87 Difference]: Start difference. First operand 142027 states and 415687 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:44,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:44,991 INFO L93 Difference]: Finished difference Result 144907 states and 424071 transitions. [2020-12-17 20:43:44,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-17 20:43:44,991 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-12-17 20:43:44,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:44,992 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=550, Invalid=1430, Unknown=0, NotChecked=0, Total=1980 [2020-12-17 20:43:44,992 INFO L78 Accepts]: Start accepts. Automaton has 144907 states and 424071 transitions. Word has length 71 [2020-12-17 20:43:44,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:44,993 INFO L481 AbstractCegarLoop]: Abstraction has 144907 states and 424071 transitions. [2020-12-17 20:43:44,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:44,993 INFO L276 IsEmpty]: Start isEmpty. Operand 144907 states and 424071 transitions. [2020-12-17 20:43:45,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:43:45,108 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:45,108 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:45,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-17 20:43:45,309 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:45,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:45,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1407708878, now seen corresponding path program 35 times [2020-12-17 20:43:45,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:45,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650014314] [2020-12-17 20:43:45,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:45,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650014314] [2020-12-17 20:43:45,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305242980] [2020-12-17 20:43:45,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:45,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-17 20:43:45,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:45,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:43:45,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:45,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:45,571 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:45,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:45,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-17 20:43:45,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976688881] [2020-12-17 20:43:45,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:43:45,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:45,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:43:45,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:43:45,575 INFO L87 Difference]: Start difference. First operand 144907 states and 424071 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:47,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:47,513 INFO L93 Difference]: Finished difference Result 148171 states and 433671 transitions. [2020-12-17 20:43:47,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-17 20:43:47,514 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-12-17 20:43:47,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:47,515 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=602, Invalid=1378, Unknown=0, NotChecked=0, Total=1980 [2020-12-17 20:43:47,515 INFO L78 Accepts]: Start accepts. Automaton has 148171 states and 433671 transitions. Word has length 71 [2020-12-17 20:43:47,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:47,515 INFO L481 AbstractCegarLoop]: Abstraction has 148171 states and 433671 transitions. [2020-12-17 20:43:47,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:47,515 INFO L276 IsEmpty]: Start isEmpty. Operand 148171 states and 433671 transitions. [2020-12-17 20:43:47,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:43:47,634 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:47,635 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:47,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:47,835 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:47,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:47,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1410682108, now seen corresponding path program 36 times [2020-12-17 20:43:47,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:47,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708443308] [2020-12-17 20:43:47,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:47,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708443308] [2020-12-17 20:43:47,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211115428] [2020-12-17 20:43:47,992 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 [2020-12-17 20:43:48,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-17 20:43:48,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:48,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:43:48,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:48,096 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:43:48,112 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:48,118 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:48,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:48,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-17 20:43:48,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3538623] [2020-12-17 20:43:48,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:43:48,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:48,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:43:48,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:43:48,120 INFO L87 Difference]: Start difference. First operand 148171 states and 433671 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:50,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:50,317 INFO L93 Difference]: Finished difference Result 148427 states and 434375 transitions. [2020-12-17 20:43:50,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-17 20:43:50,318 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-12-17 20:43:50,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:50,319 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-12-17 20:43:50,319 INFO L78 Accepts]: Start accepts. Automaton has 148427 states and 434375 transitions. Word has length 71 [2020-12-17 20:43:50,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:50,319 INFO L481 AbstractCegarLoop]: Abstraction has 148427 states and 434375 transitions. [2020-12-17 20:43:50,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:50,319 INFO L276 IsEmpty]: Start isEmpty. Operand 148427 states and 434375 transitions. [2020-12-17 20:43:50,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:43:50,492 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:50,492 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:50,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-17 20:43:50,693 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:50,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:50,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1682215820, now seen corresponding path program 37 times [2020-12-17 20:43:50,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:50,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237989868] [2020-12-17 20:43:50,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:50,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237989868] [2020-12-17 20:43:50,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892557343] [2020-12-17 20:43:50,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-17 20:43:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:51,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:43:51,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:51,121 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:51,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:51,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-17 20:43:51,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359573958] [2020-12-17 20:43:51,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-17 20:43:51,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:51,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-17 20:43:51,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-12-17 20:43:51,148 INFO L87 Difference]: Start difference. First operand 148427 states and 434375 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:53,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:53,116 INFO L93 Difference]: Finished difference Result 151691 states and 444039 transitions. [2020-12-17 20:43:53,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-17 20:43:53,126 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-12-17 20:43:53,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:53,127 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2020-12-17 20:43:53,127 INFO L78 Accepts]: Start accepts. Automaton has 151691 states and 444039 transitions. Word has length 76 [2020-12-17 20:43:53,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:53,128 INFO L481 AbstractCegarLoop]: Abstraction has 151691 states and 444039 transitions. [2020-12-17 20:43:53,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:53,128 INFO L276 IsEmpty]: Start isEmpty. Operand 151691 states and 444039 transitions. [2020-12-17 20:43:53,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:43:53,298 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:53,298 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:53,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:53,499 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:53,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:53,500 INFO L82 PathProgramCache]: Analyzing trace with hash 247870558, now seen corresponding path program 38 times [2020-12-17 20:43:53,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:53,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868703916] [2020-12-17 20:43:53,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:53,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868703916] [2020-12-17 20:43:53,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741224741] [2020-12-17 20:43:53,727 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 [2020-12-17 20:43:53,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:43:53,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:53,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:43:53,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:53,829 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:43:53,870 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:53,880 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:53,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:53,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-12-17 20:43:53,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945571557] [2020-12-17 20:43:53,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:43:53,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:53,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:43:53,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:43:53,881 INFO L87 Difference]: Start difference. First operand 151691 states and 444039 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:55,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:55,141 INFO L93 Difference]: Finished difference Result 153803 states and 450247 transitions. [2020-12-17 20:43:55,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-17 20:43:55,142 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-12-17 20:43:55,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:55,143 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=535, Invalid=1357, Unknown=0, NotChecked=0, Total=1892 [2020-12-17 20:43:55,143 INFO L78 Accepts]: Start accepts. Automaton has 153803 states and 450247 transitions. Word has length 76 [2020-12-17 20:43:55,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:55,143 INFO L481 AbstractCegarLoop]: Abstraction has 153803 states and 450247 transitions. [2020-12-17 20:43:55,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:55,143 INFO L276 IsEmpty]: Start isEmpty. Operand 153803 states and 450247 transitions. [2020-12-17 20:43:55,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:43:55,944 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:55,945 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:56,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-17 20:43:56,158 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:56,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:56,158 INFO L82 PathProgramCache]: Analyzing trace with hash 2074066552, now seen corresponding path program 39 times [2020-12-17 20:43:56,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:56,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716185698] [2020-12-17 20:43:56,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:56,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716185698] [2020-12-17 20:43:56,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353745682] [2020-12-17 20:43:56,365 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 [2020-12-17 20:43:56,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-17 20:43:56,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:56,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:43:56,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:56,479 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:56,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:56,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-17 20:43:56,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090717963] [2020-12-17 20:43:56,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-17 20:43:56,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:56,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-17 20:43:56,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-12-17 20:43:56,492 INFO L87 Difference]: Start difference. First operand 153803 states and 450247 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:57,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:57,635 INFO L93 Difference]: Finished difference Result 156043 states and 456839 transitions. [2020-12-17 20:43:57,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-17 20:43:57,635 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-12-17 20:43:57,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:57,636 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=458, Invalid=1182, Unknown=0, NotChecked=0, Total=1640 [2020-12-17 20:43:57,636 INFO L78 Accepts]: Start accepts. Automaton has 156043 states and 456839 transitions. Word has length 76 [2020-12-17 20:43:57,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:57,637 INFO L481 AbstractCegarLoop]: Abstraction has 156043 states and 456839 transitions. [2020-12-17 20:43:57,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:57,637 INFO L276 IsEmpty]: Start isEmpty. Operand 156043 states and 456839 transitions. [2020-12-17 20:43:58,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:43:58,426 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:58,427 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:43:58,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:58,638 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:58,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:58,639 INFO L82 PathProgramCache]: Analyzing trace with hash -59228856, now seen corresponding path program 40 times [2020-12-17 20:43:58,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:58,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003910130] [2020-12-17 20:43:58,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:58,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003910130] [2020-12-17 20:43:58,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000833785] [2020-12-17 20:43:58,853 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 [2020-12-17 20:43:58,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:43:58,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:58,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-17 20:43:58,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:58,945 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:43:58,985 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:58,996 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:58,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:58,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-12-17 20:43:58,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335913565] [2020-12-17 20:43:58,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:43:58,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:58,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:43:58,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:43:58,997 INFO L87 Difference]: Start difference. First operand 156043 states and 456839 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:00,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:00,393 INFO L93 Difference]: Finished difference Result 158027 states and 462663 transitions. [2020-12-17 20:44:00,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-17 20:44:00,393 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-12-17 20:44:00,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:00,394 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=565, Invalid=1505, Unknown=0, NotChecked=0, Total=2070 [2020-12-17 20:44:00,395 INFO L78 Accepts]: Start accepts. Automaton has 158027 states and 462663 transitions. Word has length 76 [2020-12-17 20:44:00,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:00,395 INFO L481 AbstractCegarLoop]: Abstraction has 158027 states and 462663 transitions. [2020-12-17 20:44:00,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:00,395 INFO L276 IsEmpty]: Start isEmpty. Operand 158027 states and 462663 transitions. [2020-12-17 20:44:00,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:44:00,521 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:00,521 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:44:00,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-17 20:44:00,722 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:00,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:00,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1831372022, now seen corresponding path program 41 times [2020-12-17 20:44:00,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:00,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555542532] [2020-12-17 20:44:00,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:01,638 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 7 [2020-12-17 20:44:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:01,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555542532] [2020-12-17 20:44:01,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661270114] [2020-12-17 20:44:01,664 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 [2020-12-17 20:44:01,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-17 20:44:01,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:01,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:44:01,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:01,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:01,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:01,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-17 20:44:01,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125187478] [2020-12-17 20:44:01,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-17 20:44:01,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:01,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-17 20:44:01,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-12-17 20:44:01,819 INFO L87 Difference]: Start difference. First operand 158027 states and 462663 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:03,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:03,295 INFO L93 Difference]: Finished difference Result 160011 states and 468487 transitions. [2020-12-17 20:44:03,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-17 20:44:03,295 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-12-17 20:44:03,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:03,296 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-12-17 20:44:03,296 INFO L78 Accepts]: Start accepts. Automaton has 160011 states and 468487 transitions. Word has length 76 [2020-12-17 20:44:03,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:03,297 INFO L481 AbstractCegarLoop]: Abstraction has 160011 states and 468487 transitions. [2020-12-17 20:44:03,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:03,297 INFO L276 IsEmpty]: Start isEmpty. Operand 160011 states and 468487 transitions. [2020-12-17 20:44:03,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:44:03,441 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:03,441 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:44:03,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-17 20:44:03,642 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:03,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:03,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1241888826, now seen corresponding path program 42 times [2020-12-17 20:44:03,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:03,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745608914] [2020-12-17 20:44:03,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:03,853 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:03,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745608914] [2020-12-17 20:44:03,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075247425] [2020-12-17 20:44:03,854 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 [2020-12-17 20:44:03,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-17 20:44:03,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:03,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:44:03,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:03,956 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:44:03,990 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:04,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:04,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-12-17 20:44:04,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260709409] [2020-12-17 20:44:04,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:44:04,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:04,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:44:04,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:44:04,001 INFO L87 Difference]: Start difference. First operand 160011 states and 468487 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:04,945 WARN L193 SmtUtils]: Spent 753.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 11 [2020-12-17 20:44:06,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:06,256 INFO L93 Difference]: Finished difference Result 161739 states and 473543 transitions. [2020-12-17 20:44:06,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-17 20:44:06,256 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-12-17 20:44:06,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:06,257 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=615, Invalid=1641, Unknown=0, NotChecked=0, Total=2256 [2020-12-17 20:44:06,257 INFO L78 Accepts]: Start accepts. Automaton has 161739 states and 473543 transitions. Word has length 76 [2020-12-17 20:44:06,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:06,257 INFO L481 AbstractCegarLoop]: Abstraction has 161739 states and 473543 transitions. [2020-12-17 20:44:06,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:06,257 INFO L276 IsEmpty]: Start isEmpty. Operand 161739 states and 473543 transitions. [2020-12-17 20:44:06,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:44:06,384 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:06,384 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:44:06,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:06,585 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:06,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:06,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1963045108, now seen corresponding path program 43 times [2020-12-17 20:44:06,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:06,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721134181] [2020-12-17 20:44:06,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:06,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721134181] [2020-12-17 20:44:06,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288130499] [2020-12-17 20:44:06,774 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 [2020-12-17 20:44:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:06,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:44:06,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:06,894 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:06,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:06,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-17 20:44:06,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336238480] [2020-12-17 20:44:06,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-17 20:44:06,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:06,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-17 20:44:06,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-12-17 20:44:06,904 INFO L87 Difference]: Start difference. First operand 161739 states and 473543 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:08,153 WARN L193 SmtUtils]: Spent 858.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2020-12-17 20:44:09,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:09,117 INFO L93 Difference]: Finished difference Result 163595 states and 478983 transitions. [2020-12-17 20:44:09,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-17 20:44:09,119 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-12-17 20:44:09,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:09,120 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=562, Invalid=1418, Unknown=0, NotChecked=0, Total=1980 [2020-12-17 20:44:09,120 INFO L78 Accepts]: Start accepts. Automaton has 163595 states and 478983 transitions. Word has length 76 [2020-12-17 20:44:09,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:09,121 INFO L481 AbstractCegarLoop]: Abstraction has 163595 states and 478983 transitions. [2020-12-17 20:44:09,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:09,121 INFO L276 IsEmpty]: Start isEmpty. Operand 163595 states and 478983 transitions. [2020-12-17 20:44:09,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:44:09,249 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:09,250 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:44:09,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-17 20:44:09,451 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:09,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:09,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1412319292, now seen corresponding path program 44 times [2020-12-17 20:44:09,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:09,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694965723] [2020-12-17 20:44:09,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:09,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694965723] [2020-12-17 20:44:09,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760308704] [2020-12-17 20:44:09,638 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 [2020-12-17 20:44:09,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:44:09,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:09,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:44:09,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:09,739 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:44:09,779 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:09,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:09,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-12-17 20:44:09,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038062087] [2020-12-17 20:44:09,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:44:09,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:09,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:44:09,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:44:09,789 INFO L87 Difference]: Start difference. First operand 163595 states and 478983 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:11,295 WARN L193 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 11 [2020-12-17 20:44:12,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:12,241 INFO L93 Difference]: Finished difference Result 166475 states and 487367 transitions. [2020-12-17 20:44:12,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-17 20:44:12,241 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-12-17 20:44:12,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:12,242 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=685, Invalid=1765, Unknown=0, NotChecked=0, Total=2450 [2020-12-17 20:44:12,248 INFO L78 Accepts]: Start accepts. Automaton has 166475 states and 487367 transitions. Word has length 76 [2020-12-17 20:44:12,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:12,248 INFO L481 AbstractCegarLoop]: Abstraction has 166475 states and 487367 transitions. [2020-12-17 20:44:12,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:12,248 INFO L276 IsEmpty]: Start isEmpty. Operand 166475 states and 487367 transitions. [2020-12-17 20:44:12,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:44:12,378 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:12,378 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:44:12,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:12,588 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:12,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:12,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1060243374, now seen corresponding path program 45 times [2020-12-17 20:44:12,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:12,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064927685] [2020-12-17 20:44:12,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:12,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064927685] [2020-12-17 20:44:12,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070912677] [2020-12-17 20:44:12,758 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 [2020-12-17 20:44:12,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-17 20:44:12,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:12,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:44:12,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:12,872 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:12,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:12,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-17 20:44:12,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921895979] [2020-12-17 20:44:12,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-17 20:44:12,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:12,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-17 20:44:12,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-12-17 20:44:12,881 INFO L87 Difference]: Start difference. First operand 166475 states and 487367 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:15,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:15,248 INFO L93 Difference]: Finished difference Result 169739 states and 496967 transitions. [2020-12-17 20:44:15,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-17 20:44:15,249 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-12-17 20:44:15,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:15,249 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=644, Invalid=1518, Unknown=0, NotChecked=0, Total=2162 [2020-12-17 20:44:15,249 INFO L78 Accepts]: Start accepts. Automaton has 169739 states and 496967 transitions. Word has length 76 [2020-12-17 20:44:15,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:15,250 INFO L481 AbstractCegarLoop]: Abstraction has 169739 states and 496967 transitions. [2020-12-17 20:44:15,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:15,250 INFO L276 IsEmpty]: Start isEmpty. Operand 169739 states and 496967 transitions. [2020-12-17 20:44:15,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:44:15,392 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:15,393 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:44:15,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:15,594 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:15,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:15,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1063216604, now seen corresponding path program 46 times [2020-12-17 20:44:15,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:15,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505863096] [2020-12-17 20:44:15,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:15,774 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:15,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505863096] [2020-12-17 20:44:15,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484200068] [2020-12-17 20:44:15,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:15,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:44:15,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:15,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-17 20:44:15,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:15,885 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:44:15,925 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:15,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:15,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-12-17 20:44:15,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411872699] [2020-12-17 20:44:15,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:44:15,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:15,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:44:15,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:44:15,937 INFO L87 Difference]: Start difference. First operand 169739 states and 496967 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:18,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:18,614 INFO L93 Difference]: Finished difference Result 173195 states and 506951 transitions. [2020-12-17 20:44:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-17 20:44:18,615 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-12-17 20:44:18,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:18,615 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=816, Invalid=2046, Unknown=0, NotChecked=0, Total=2862 [2020-12-17 20:44:18,615 INFO L78 Accepts]: Start accepts. Automaton has 173195 states and 506951 transitions. Word has length 76 [2020-12-17 20:44:18,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:18,616 INFO L481 AbstractCegarLoop]: Abstraction has 173195 states and 506951 transitions. [2020-12-17 20:44:18,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:18,616 INFO L276 IsEmpty]: Start isEmpty. Operand 173195 states and 506951 transitions. [2020-12-17 20:44:18,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:44:18,764 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:18,764 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:44:18,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-17 20:44:18,965 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:18,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:18,966 INFO L82 PathProgramCache]: Analyzing trace with hash -298810531, now seen corresponding path program 47 times [2020-12-17 20:44:18,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:18,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312782667] [2020-12-17 20:44:18,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:18,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:19,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312782667] [2020-12-17 20:44:19,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093747985] [2020-12-17 20:44:19,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:19,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-17 20:44:19,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:19,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-17 20:44:19,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:19,310 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:19,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:19,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-17 20:44:19,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383213106] [2020-12-17 20:44:19,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:44:19,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:19,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:44:19,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:44:19,325 INFO L87 Difference]: Start difference. First operand 173195 states and 506951 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:21,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:21,202 INFO L93 Difference]: Finished difference Result 175691 states and 514311 transitions. [2020-12-17 20:44:21,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-17 20:44:21,203 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-12-17 20:44:21,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:21,203 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=504, Invalid=1136, Unknown=0, NotChecked=0, Total=1640 [2020-12-17 20:44:21,203 INFO L78 Accepts]: Start accepts. Automaton has 175691 states and 514311 transitions. Word has length 81 [2020-12-17 20:44:21,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:21,204 INFO L481 AbstractCegarLoop]: Abstraction has 175691 states and 514311 transitions. [2020-12-17 20:44:21,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:21,204 INFO L276 IsEmpty]: Start isEmpty. Operand 175691 states and 514311 transitions. [2020-12-17 20:44:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:44:21,357 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:21,357 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:44:21,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:21,571 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:21,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:21,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1053083055, now seen corresponding path program 48 times [2020-12-17 20:44:21,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:21,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989244035] [2020-12-17 20:44:21,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:21,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989244035] [2020-12-17 20:44:21,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577808893] [2020-12-17 20:44:21,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:21,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-17 20:44:21,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:21,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-17 20:44:21,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:21,929 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:44:21,968 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:21,979 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:21,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:21,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-12-17 20:44:21,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098086215] [2020-12-17 20:44:21,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-17 20:44:21,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:21,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-17 20:44:21,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-12-17 20:44:21,981 INFO L87 Difference]: Start difference. First operand 175691 states and 514311 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:24,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:24,452 INFO L93 Difference]: Finished difference Result 178059 states and 521287 transitions. [2020-12-17 20:44:24,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-17 20:44:24,453 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-12-17 20:44:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:24,454 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=545, Invalid=1435, Unknown=0, NotChecked=0, Total=1980 [2020-12-17 20:44:24,454 INFO L78 Accepts]: Start accepts. Automaton has 178059 states and 521287 transitions. Word has length 81 [2020-12-17 20:44:24,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:24,454 INFO L481 AbstractCegarLoop]: Abstraction has 178059 states and 521287 transitions. [2020-12-17 20:44:24,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:24,455 INFO L276 IsEmpty]: Start isEmpty. Operand 178059 states and 521287 transitions. [2020-12-17 20:44:24,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:44:24,714 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:24,714 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:44:24,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-17 20:44:24,927 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:24,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:24,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1745619127, now seen corresponding path program 49 times [2020-12-17 20:44:24,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:24,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34266083] [2020-12-17 20:44:24,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:25,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34266083] [2020-12-17 20:44:25,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822659333] [2020-12-17 20:44:25,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:25,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-17 20:44:25,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:25,304 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:25,320 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:25,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:25,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-17 20:44:25,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438494343] [2020-12-17 20:44:25,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:44:25,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:25,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:44:25,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:44:25,322 INFO L87 Difference]: Start difference. First operand 178059 states and 521287 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:27,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:27,365 INFO L93 Difference]: Finished difference Result 180555 states and 528647 transitions. [2020-12-17 20:44:27,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-17 20:44:27,366 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-12-17 20:44:27,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:27,367 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=539, Invalid=1441, Unknown=0, NotChecked=0, Total=1980 [2020-12-17 20:44:27,367 INFO L78 Accepts]: Start accepts. Automaton has 180555 states and 528647 transitions. Word has length 81 [2020-12-17 20:44:27,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:27,367 INFO L481 AbstractCegarLoop]: Abstraction has 180555 states and 528647 transitions. [2020-12-17 20:44:27,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:27,367 INFO L276 IsEmpty]: Start isEmpty. Operand 180555 states and 528647 transitions. [2020-12-17 20:44:27,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:44:27,702 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:27,702 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:44:27,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-17 20:44:27,903 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:27,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:27,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1956131353, now seen corresponding path program 50 times [2020-12-17 20:44:27,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:27,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660281166] [2020-12-17 20:44:27,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:28,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660281166] [2020-12-17 20:44:28,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250355453] [2020-12-17 20:44:28,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:28,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:44:28,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:28,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-17 20:44:28,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:28,291 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:44:28,453 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:28,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:28,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-12-17 20:44:28,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226075960] [2020-12-17 20:44:28,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-17 20:44:28,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:28,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-17 20:44:28,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-12-17 20:44:28,475 INFO L87 Difference]: Start difference. First operand 180555 states and 528647 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:30,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:30,882 INFO L93 Difference]: Finished difference Result 184267 states and 539527 transitions. [2020-12-17 20:44:30,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-17 20:44:30,883 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-12-17 20:44:30,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:30,883 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=620, Invalid=1636, Unknown=0, NotChecked=0, Total=2256 [2020-12-17 20:44:30,884 INFO L78 Accepts]: Start accepts. Automaton has 184267 states and 539527 transitions. Word has length 81 [2020-12-17 20:44:30,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:30,884 INFO L481 AbstractCegarLoop]: Abstraction has 184267 states and 539527 transitions. [2020-12-17 20:44:30,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:30,884 INFO L276 IsEmpty]: Start isEmpty. Operand 184267 states and 539527 transitions. [2020-12-17 20:44:31,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:44:31,080 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:31,080 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:44:31,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-17 20:44:31,293 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:31,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:31,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1783445575, now seen corresponding path program 51 times [2020-12-17 20:44:31,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:31,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965479721] [2020-12-17 20:44:31,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:31,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965479721] [2020-12-17 20:44:31,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690527978] [2020-12-17 20:44:31,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:31,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-17 20:44:31,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:31,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-17 20:44:31,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:31,651 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:31,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:31,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-17 20:44:31,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587586264] [2020-12-17 20:44:31,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:44:31,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:31,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:44:31,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:44:31,670 INFO L87 Difference]: Start difference. First operand 184267 states and 539527 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:34,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:34,371 INFO L93 Difference]: Finished difference Result 186507 states and 546119 transitions. [2020-12-17 20:44:34,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-17 20:44:34,371 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-12-17 20:44:34,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:34,387 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=627, Invalid=1629, Unknown=0, NotChecked=0, Total=2256 [2020-12-17 20:44:34,387 INFO L78 Accepts]: Start accepts. Automaton has 186507 states and 546119 transitions. Word has length 81 [2020-12-17 20:44:34,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:34,387 INFO L481 AbstractCegarLoop]: Abstraction has 186507 states and 546119 transitions. [2020-12-17 20:44:34,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:34,387 INFO L276 IsEmpty]: Start isEmpty. Operand 186507 states and 546119 transitions. [2020-12-17 20:44:34,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:44:34,794 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:34,795 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:44:35,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-17 20:44:35,008 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:35,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:35,009 INFO L82 PathProgramCache]: Analyzing trace with hash -349849833, now seen corresponding path program 52 times [2020-12-17 20:44:35,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:35,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162159615] [2020-12-17 20:44:35,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:35,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:35,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162159615] [2020-12-17 20:44:35,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862315613] [2020-12-17 20:44:35,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:35,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:44:35,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:35,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-17 20:44:35,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:35,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:44:35,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:35,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:35,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-12-17 20:44:35,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57040048] [2020-12-17 20:44:35,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-17 20:44:35,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:35,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-17 20:44:35,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-12-17 20:44:35,388 INFO L87 Difference]: Start difference. First operand 186507 states and 546119 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:37,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:37,987 INFO L93 Difference]: Finished difference Result 188363 states and 551559 transitions. [2020-12-17 20:44:37,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-17 20:44:37,988 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-12-17 20:44:37,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:37,989 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=659, Invalid=1791, Unknown=0, NotChecked=0, Total=2450 [2020-12-17 20:44:37,989 INFO L78 Accepts]: Start accepts. Automaton has 188363 states and 551559 transitions. Word has length 81 [2020-12-17 20:44:37,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:37,989 INFO L481 AbstractCegarLoop]: Abstraction has 188363 states and 551559 transitions. [2020-12-17 20:44:37,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:37,989 INFO L276 IsEmpty]: Start isEmpty. Operand 188363 states and 551559 transitions. [2020-12-17 20:44:38,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:44:38,254 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:38,255 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:44:38,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:38,468 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:38,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:38,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1540751045, now seen corresponding path program 53 times [2020-12-17 20:44:38,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:38,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104692024] [2020-12-17 20:44:38,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:38,929 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:38,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104692024] [2020-12-17 20:44:38,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571356671] [2020-12-17 20:44:38,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:39,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-17 20:44:39,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:39,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-17 20:44:39,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:39,043 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:39,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:39,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-17 20:44:39,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796806954] [2020-12-17 20:44:39,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:44:39,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:39,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:44:39,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:44:39,058 INFO L87 Difference]: Start difference. First operand 188363 states and 551559 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:41,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:41,323 INFO L93 Difference]: Finished difference Result 190347 states and 557383 transitions. [2020-12-17 20:44:41,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-17 20:44:41,324 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-12-17 20:44:41,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:41,324 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=686, Invalid=1764, Unknown=0, NotChecked=0, Total=2450 [2020-12-17 20:44:41,325 INFO L78 Accepts]: Start accepts. Automaton has 190347 states and 557383 transitions. Word has length 81 [2020-12-17 20:44:41,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:41,325 INFO L481 AbstractCegarLoop]: Abstraction has 190347 states and 557383 transitions. [2020-12-17 20:44:41,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:41,325 INFO L276 IsEmpty]: Start isEmpty. Operand 190347 states and 557383 transitions. [2020-12-17 20:44:41,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:44:41,675 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:41,676 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:44:41,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:41,892 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:41,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:41,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1532509803, now seen corresponding path program 54 times [2020-12-17 20:44:41,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:41,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494451013] [2020-12-17 20:44:41,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:42,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494451013] [2020-12-17 20:44:42,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355730172] [2020-12-17 20:44:42,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:42,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-17 20:44:42,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:42,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-17 20:44:42,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:42,276 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:44:42,312 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:42,323 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:42,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:42,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-12-17 20:44:42,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945496405] [2020-12-17 20:44:42,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-17 20:44:42,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:42,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-17 20:44:42,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-12-17 20:44:42,325 INFO L87 Difference]: Start difference. First operand 190347 states and 557383 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:44,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:44,816 INFO L93 Difference]: Finished difference Result 191947 states and 562055 transitions. [2020-12-17 20:44:44,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-17 20:44:44,817 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-12-17 20:44:44,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:44,817 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=718, Invalid=1934, Unknown=0, NotChecked=0, Total=2652 [2020-12-17 20:44:44,817 INFO L78 Accepts]: Start accepts. Automaton has 191947 states and 562055 transitions. Word has length 81 [2020-12-17 20:44:44,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:44,818 INFO L481 AbstractCegarLoop]: Abstraction has 191947 states and 562055 transitions. [2020-12-17 20:44:44,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:44,818 INFO L276 IsEmpty]: Start isEmpty. Operand 191947 states and 562055 transitions. [2020-12-17 20:44:45,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:44:45,192 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:45,192 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:44:45,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:45,408 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:45,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:45,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1672424131, now seen corresponding path program 55 times [2020-12-17 20:44:45,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:45,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762886579] [2020-12-17 20:44:45,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:45,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762886579] [2020-12-17 20:44:45,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475203284] [2020-12-17 20:44:45,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:45,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-17 20:44:45,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:45,739 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:45,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:45,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-17 20:44:45,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335909940] [2020-12-17 20:44:45,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:44:45,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:45,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:44:45,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:44:45,751 INFO L87 Difference]: Start difference. First operand 191947 states and 562055 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:48,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:48,145 INFO L93 Difference]: Finished difference Result 193803 states and 567495 transitions. [2020-12-17 20:44:48,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-17 20:44:48,146 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-12-17 20:44:48,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:48,147 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=765, Invalid=1887, Unknown=0, NotChecked=0, Total=2652 [2020-12-17 20:44:48,147 INFO L78 Accepts]: Start accepts. Automaton has 193803 states and 567495 transitions. Word has length 81 [2020-12-17 20:44:48,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:48,147 INFO L481 AbstractCegarLoop]: Abstraction has 193803 states and 567495 transitions. [2020-12-17 20:44:48,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:48,147 INFO L276 IsEmpty]: Start isEmpty. Operand 193803 states and 567495 transitions. [2020-12-17 20:44:48,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:44:48,523 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:48,523 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:44:48,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-12-17 20:44:48,737 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:48,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:48,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1702940269, now seen corresponding path program 56 times [2020-12-17 20:44:48,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:48,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936070885] [2020-12-17 20:44:48,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:48,979 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:48,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936070885] [2020-12-17 20:44:48,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263717852] [2020-12-17 20:44:48,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:49,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:44:49,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:49,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-17 20:44:49,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:49,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:44:49,199 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:49,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:49,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-12-17 20:44:49,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333985052] [2020-12-17 20:44:49,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-17 20:44:49,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:49,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-17 20:44:49,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-12-17 20:44:49,211 INFO L87 Difference]: Start difference. First operand 193803 states and 567495 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:51,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:51,915 INFO L93 Difference]: Finished difference Result 196043 states and 574023 transitions. [2020-12-17 20:44:51,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-17 20:44:51,919 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-12-17 20:44:51,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:51,933 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=797, Invalid=2065, Unknown=0, NotChecked=0, Total=2862 [2020-12-17 20:44:51,933 INFO L78 Accepts]: Start accepts. Automaton has 196043 states and 574023 transitions. Word has length 81 [2020-12-17 20:44:51,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:51,934 INFO L481 AbstractCegarLoop]: Abstraction has 196043 states and 574023 transitions. [2020-12-17 20:44:51,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:51,934 INFO L276 IsEmpty]: Start isEmpty. Operand 196043 states and 574023 transitions. [2020-12-17 20:44:52,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:44:52,215 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:52,215 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:44:52,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:52,429 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:52,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:52,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1350864351, now seen corresponding path program 57 times [2020-12-17 20:44:52,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:52,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550161394] [2020-12-17 20:44:52,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:52,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550161394] [2020-12-17 20:44:52,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680511556] [2020-12-17 20:44:52,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:52,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-17 20:44:52,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:52,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-17 20:44:52,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:52,754 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:52,763 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:52,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:52,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-17 20:44:52,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323825436] [2020-12-17 20:44:52,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:44:52,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:52,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:44:52,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:44:52,765 INFO L87 Difference]: Start difference. First operand 196043 states and 574023 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:55,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:55,579 INFO L93 Difference]: Finished difference Result 199307 states and 583623 transitions. [2020-12-17 20:44:55,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-17 20:44:55,579 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-12-17 20:44:55,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:55,580 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=864, Invalid=1998, Unknown=0, NotChecked=0, Total=2862 [2020-12-17 20:44:55,580 INFO L78 Accepts]: Start accepts. Automaton has 199307 states and 583623 transitions. Word has length 81 [2020-12-17 20:44:55,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:55,580 INFO L481 AbstractCegarLoop]: Abstraction has 199307 states and 583623 transitions. [2020-12-17 20:44:55,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:55,581 INFO L276 IsEmpty]: Start isEmpty. Operand 199307 states and 583623 transitions. [2020-12-17 20:44:55,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:44:55,775 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:55,776 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:44:55,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-17 20:44:55,989 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:55,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:55,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1353837581, now seen corresponding path program 58 times [2020-12-17 20:44:55,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:55,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874633799] [2020-12-17 20:44:55,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:56,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874633799] [2020-12-17 20:44:56,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673308048] [2020-12-17 20:44:56,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:56,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:44:56,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:56,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-17 20:44:56,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:57,202 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:44:57,227 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:57,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:57,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-12-17 20:44:57,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039002597] [2020-12-17 20:44:57,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-17 20:44:57,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:57,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-17 20:44:57,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-12-17 20:44:57,241 INFO L87 Difference]: Start difference. First operand 199307 states and 583623 transitions. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:00,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:00,244 INFO L93 Difference]: Finished difference Result 200651 states and 587463 transitions. [2020-12-17 20:45:00,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-17 20:45:00,245 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-12-17 20:45:00,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:00,246 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=940, Invalid=2366, Unknown=0, NotChecked=0, Total=3306 [2020-12-17 20:45:00,246 INFO L78 Accepts]: Start accepts. Automaton has 200651 states and 587463 transitions. Word has length 81 [2020-12-17 20:45:00,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:00,246 INFO L481 AbstractCegarLoop]: Abstraction has 200651 states and 587463 transitions. [2020-12-17 20:45:00,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:00,246 INFO L276 IsEmpty]: Start isEmpty. Operand 200651 states and 587463 transitions. [2020-12-17 20:45:00,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-17 20:45:00,559 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:00,559 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:45:00,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:00,774 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:00,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:00,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1585971837, now seen corresponding path program 59 times [2020-12-17 20:45:00,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:00,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479231241] [2020-12-17 20:45:00,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:01,233 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 3 [2020-12-17 20:45:01,480 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2020-12-17 20:45:01,682 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:01,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479231241] [2020-12-17 20:45:01,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601488577] [2020-12-17 20:45:01,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:01,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-17 20:45:01,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:01,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-17 20:45:01,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:01,936 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:01,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:01,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-17 20:45:01,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230714483] [2020-12-17 20:45:01,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-17 20:45:01,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:01,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-17 20:45:01,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-12-17 20:45:01,955 INFO L87 Difference]: Start difference. First operand 200651 states and 587463 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:04,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:04,450 INFO L93 Difference]: Finished difference Result 204171 states and 597895 transitions. [2020-12-17 20:45:04,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-17 20:45:04,451 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-12-17 20:45:04,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:04,451 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=583, Invalid=1397, Unknown=0, NotChecked=0, Total=1980 [2020-12-17 20:45:04,452 INFO L78 Accepts]: Start accepts. Automaton has 204171 states and 597895 transitions. Word has length 86 [2020-12-17 20:45:04,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:04,452 INFO L481 AbstractCegarLoop]: Abstraction has 204171 states and 597895 transitions. [2020-12-17 20:45:04,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:04,452 INFO L276 IsEmpty]: Start isEmpty. Operand 204171 states and 597895 transitions. [2020-12-17 20:45:04,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-17 20:45:04,795 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:04,795 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:45:05,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-12-17 20:45:05,008 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:05,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:05,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1357101873, now seen corresponding path program 60 times [2020-12-17 20:45:05,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:05,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948522026] [2020-12-17 20:45:05,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:05,303 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:05,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948522026] [2020-12-17 20:45:05,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851910323] [2020-12-17 20:45:05,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:05,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-17 20:45:05,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:05,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-17 20:45:05,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:05,410 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:45:05,452 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:05,470 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:05,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:05,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-12-17 20:45:05,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626727193] [2020-12-17 20:45:05,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:45:05,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:05,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:45:05,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:45:05,472 INFO L87 Difference]: Start difference. First operand 204171 states and 597895 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:08,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:08,097 INFO L93 Difference]: Finished difference Result 206411 states and 604487 transitions. [2020-12-17 20:45:08,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-17 20:45:08,098 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-12-17 20:45:08,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:08,099 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=692, Invalid=1758, Unknown=0, NotChecked=0, Total=2450 [2020-12-17 20:45:08,099 INFO L78 Accepts]: Start accepts. Automaton has 206411 states and 604487 transitions. Word has length 86 [2020-12-17 20:45:08,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:08,099 INFO L481 AbstractCegarLoop]: Abstraction has 206411 states and 604487 transitions. [2020-12-17 20:45:08,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:08,100 INFO L276 IsEmpty]: Start isEmpty. Operand 206411 states and 604487 transitions. [2020-12-17 20:45:08,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-17 20:45:08,368 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:08,368 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:45:08,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:08,582 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:08,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:08,583 INFO L82 PathProgramCache]: Analyzing trace with hash 139163241, now seen corresponding path program 61 times [2020-12-17 20:45:08,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:08,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332264974] [2020-12-17 20:45:08,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:08,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:08,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332264974] [2020-12-17 20:45:08,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263388881] [2020-12-17 20:45:08,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:09,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:09,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-17 20:45:09,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:09,307 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:09,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:09,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-17 20:45:09,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868863532] [2020-12-17 20:45:09,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-17 20:45:09,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:09,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-17 20:45:09,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-12-17 20:45:09,327 INFO L87 Difference]: Start difference. First operand 206411 states and 604487 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:11,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:11,873 INFO L93 Difference]: Finished difference Result 208779 states and 611463 transitions. [2020-12-17 20:45:11,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-17 20:45:11,873 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-12-17 20:45:11,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:11,874 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=603, Invalid=1559, Unknown=0, NotChecked=0, Total=2162 [2020-12-17 20:45:11,874 INFO L78 Accepts]: Start accepts. Automaton has 208779 states and 611463 transitions. Word has length 86 [2020-12-17 20:45:11,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:11,874 INFO L481 AbstractCegarLoop]: Abstraction has 208779 states and 611463 transitions. [2020-12-17 20:45:11,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:11,875 INFO L276 IsEmpty]: Start isEmpty. Operand 208779 states and 611463 transitions. [2020-12-17 20:45:12,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-17 20:45:12,184 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:12,184 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:45:12,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-17 20:45:12,397 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:12,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:12,398 INFO L82 PathProgramCache]: Analyzing trace with hash -454053575, now seen corresponding path program 62 times [2020-12-17 20:45:12,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:12,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977247987] [2020-12-17 20:45:12,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:12,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:12,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977247987] [2020-12-17 20:45:12,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646625369] [2020-12-17 20:45:12,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:12,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:45:12,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:12,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-17 20:45:12,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:12,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:45:12,962 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:12,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:12,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-12-17 20:45:12,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45617581] [2020-12-17 20:45:12,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:45:12,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:12,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:45:12,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:45:12,982 INFO L87 Difference]: Start difference. First operand 208779 states and 611463 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:15,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:15,837 INFO L93 Difference]: Finished difference Result 210891 states and 617671 transitions. [2020-12-17 20:45:15,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-17 20:45:15,837 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-12-17 20:45:15,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:15,838 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=720, Invalid=1932, Unknown=0, NotChecked=0, Total=2652 [2020-12-17 20:45:15,838 INFO L78 Accepts]: Start accepts. Automaton has 210891 states and 617671 transitions. Word has length 86 [2020-12-17 20:45:15,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:15,839 INFO L481 AbstractCegarLoop]: Abstraction has 210891 states and 617671 transitions. [2020-12-17 20:45:15,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:15,839 INFO L276 IsEmpty]: Start isEmpty. Operand 210891 states and 617671 transitions. [2020-12-17 20:45:16,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-17 20:45:16,136 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:16,136 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:45:16,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2020-12-17 20:45:16,350 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:16,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:16,350 INFO L82 PathProgramCache]: Analyzing trace with hash -626739353, now seen corresponding path program 63 times [2020-12-17 20:45:16,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:16,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543996513] [2020-12-17 20:45:16,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:16,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543996513] [2020-12-17 20:45:16,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700755765] [2020-12-17 20:45:16,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:16,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-17 20:45:16,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:16,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-17 20:45:16,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:16,907 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:16,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:16,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-17 20:45:16,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281976709] [2020-12-17 20:45:16,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-17 20:45:16,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:16,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-17 20:45:16,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-12-17 20:45:16,937 INFO L87 Difference]: Start difference. First operand 210891 states and 617671 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:19,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:19,653 INFO L93 Difference]: Finished difference Result 213003 states and 623879 transitions. [2020-12-17 20:45:19,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-17 20:45:19,654 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-12-17 20:45:19,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:19,655 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=643, Invalid=1709, Unknown=0, NotChecked=0, Total=2352 [2020-12-17 20:45:19,655 INFO L78 Accepts]: Start accepts. Automaton has 213003 states and 623879 transitions. Word has length 86 [2020-12-17 20:45:19,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:19,655 INFO L481 AbstractCegarLoop]: Abstraction has 213003 states and 623879 transitions. [2020-12-17 20:45:19,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:19,655 INFO L276 IsEmpty]: Start isEmpty. Operand 213003 states and 623879 transitions. [2020-12-17 20:45:19,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-17 20:45:19,934 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:19,934 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:45:20,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:20,149 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:20,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:20,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1534932535, now seen corresponding path program 64 times [2020-12-17 20:45:20,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:20,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652624500] [2020-12-17 20:45:20,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:20,561 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:20,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652624500] [2020-12-17 20:45:20,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203007208] [2020-12-17 20:45:20,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-17 20:45:20,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:45:20,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:20,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-17 20:45:20,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:20,686 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:45:20,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:20,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:20,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-12-17 20:45:20,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205666730] [2020-12-17 20:45:20,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:45:20,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:20,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:45:20,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:45:20,744 INFO L87 Difference]: Start difference. First operand 213003 states and 623879 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:23,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:23,861 INFO L93 Difference]: Finished difference Result 214859 states and 629319 transitions. [2020-12-17 20:45:23,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-17 20:45:23,862 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-12-17 20:45:23,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:23,863 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=768, Invalid=2094, Unknown=0, NotChecked=0, Total=2862 [2020-12-17 20:45:23,863 INFO L78 Accepts]: Start accepts. Automaton has 214859 states and 629319 transitions. Word has length 86 [2020-12-17 20:45:23,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:23,863 INFO L481 AbstractCegarLoop]: Abstraction has 214859 states and 629319 transitions. [2020-12-17 20:45:23,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:23,863 INFO L276 IsEmpty]: Start isEmpty. Operand 214859 states and 629319 transitions. [2020-12-17 20:45:24,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-17 20:45:24,103 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:24,103 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:45:24,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:24,316 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:24,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:24,317 INFO L82 PathProgramCache]: Analyzing trace with hash -869433883, now seen corresponding path program 65 times [2020-12-17 20:45:24,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:24,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458619628] [2020-12-17 20:45:24,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:24,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:24,539 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:24,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458619628] [2020-12-17 20:45:24,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440490362] [2020-12-17 20:45:24,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:24,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-17 20:45:24,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:24,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-17 20:45:24,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:24,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:24,770 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:24,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:24,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-17 20:45:24,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898644566] [2020-12-17 20:45:24,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-17 20:45:24,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:24,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-17 20:45:24,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-12-17 20:45:24,771 INFO L87 Difference]: Start difference. First operand 214859 states and 629319 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:26,563 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2020-12-17 20:45:27,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:27,715 INFO L93 Difference]: Finished difference Result 216843 states and 635143 transitions. [2020-12-17 20:45:27,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-17 20:45:27,716 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-12-17 20:45:27,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:27,717 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=703, Invalid=1847, Unknown=0, NotChecked=0, Total=2550 [2020-12-17 20:45:27,717 INFO L78 Accepts]: Start accepts. Automaton has 216843 states and 635143 transitions. Word has length 86 [2020-12-17 20:45:27,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:27,717 INFO L481 AbstractCegarLoop]: Abstraction has 216843 states and 635143 transitions. [2020-12-17 20:45:27,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:27,717 INFO L276 IsEmpty]: Start isEmpty. Operand 216843 states and 635143 transitions. [2020-12-17 20:45:27,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-17 20:45:27,954 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:27,954 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:45:28,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2020-12-17 20:45:28,167 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:28,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:28,168 INFO L82 PathProgramCache]: Analyzing trace with hash 352272565, now seen corresponding path program 66 times [2020-12-17 20:45:28,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:28,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38066378] [2020-12-17 20:45:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:28,401 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:28,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38066378] [2020-12-17 20:45:28,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735464792] [2020-12-17 20:45:28,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:28,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-17 20:45:28,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:28,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-17 20:45:28,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:28,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:45:28,599 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:28,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:28,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-12-17 20:45:28,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825881061] [2020-12-17 20:45:28,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:45:28,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:28,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:45:28,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:45:28,619 INFO L87 Difference]: Start difference. First operand 216843 states and 635143 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:29,625 WARN L193 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 11 [2020-12-17 20:45:29,965 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2020-12-17 20:45:31,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:31,941 INFO L93 Difference]: Finished difference Result 218443 states and 639815 transitions. [2020-12-17 20:45:31,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-17 20:45:31,942 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-12-17 20:45:31,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:31,943 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=836, Invalid=2244, Unknown=0, NotChecked=0, Total=3080 [2020-12-17 20:45:31,943 INFO L78 Accepts]: Start accepts. Automaton has 218443 states and 639815 transitions. Word has length 86 [2020-12-17 20:45:31,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:31,943 INFO L481 AbstractCegarLoop]: Abstraction has 218443 states and 639815 transitions. [2020-12-17 20:45:31,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:31,944 INFO L276 IsEmpty]: Start isEmpty. Operand 218443 states and 639815 transitions. [2020-12-17 20:45:32,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-17 20:45:32,177 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:32,177 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:45:32,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:32,391 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:32,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:32,392 INFO L82 PathProgramCache]: Analyzing trace with hash -737760797, now seen corresponding path program 67 times [2020-12-17 20:45:32,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:32,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164436554] [2020-12-17 20:45:32,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:33,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164436554] [2020-12-17 20:45:33,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439106151] [2020-12-17 20:45:33,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:34,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-17 20:45:34,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:34,070 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:34,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:34,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-17 20:45:34,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017561961] [2020-12-17 20:45:34,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-17 20:45:34,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:34,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-17 20:45:34,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-12-17 20:45:34,082 INFO L87 Difference]: Start difference. First operand 218443 states and 639815 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:35,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:35,920 INFO L93 Difference]: Finished difference Result 220299 states and 645255 transitions. [2020-12-17 20:45:35,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-17 20:45:35,921 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-12-17 20:45:35,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:35,922 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=783, Invalid=1973, Unknown=0, NotChecked=0, Total=2756 [2020-12-17 20:45:35,922 INFO L78 Accepts]: Start accepts. Automaton has 220299 states and 645255 transitions. Word has length 86 [2020-12-17 20:45:35,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:35,923 INFO L481 AbstractCegarLoop]: Abstraction has 220299 states and 645255 transitions. [2020-12-17 20:45:35,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:35,923 INFO L276 IsEmpty]: Start isEmpty. Operand 220299 states and 645255 transitions. [2020-12-17 20:45:36,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-17 20:45:36,960 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:36,960 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:45:37,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-12-17 20:45:37,173 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:37,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:37,174 INFO L82 PathProgramCache]: Analyzing trace with hash 181842099, now seen corresponding path program 68 times [2020-12-17 20:45:37,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:37,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20015637] [2020-12-17 20:45:37,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:37,473 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:37,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20015637] [2020-12-17 20:45:37,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32371224] [2020-12-17 20:45:37,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:37,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:45:37,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:37,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-17 20:45:37,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:37,668 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:45:37,702 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:37,712 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:37,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:37,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-12-17 20:45:37,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769468031] [2020-12-17 20:45:37,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:45:37,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:37,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:45:37,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:45:37,715 INFO L87 Difference]: Start difference. First operand 220299 states and 645255 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:40,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:40,631 INFO L93 Difference]: Finished difference Result 223179 states and 653639 transitions. [2020-12-17 20:45:40,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-17 20:45:40,633 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-12-17 20:45:40,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:40,634 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=924, Invalid=2382, Unknown=0, NotChecked=0, Total=3306 [2020-12-17 20:45:40,634 INFO L78 Accepts]: Start accepts. Automaton has 223179 states and 653639 transitions. Word has length 86 [2020-12-17 20:45:40,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:40,634 INFO L481 AbstractCegarLoop]: Abstraction has 223179 states and 653639 transitions. [2020-12-17 20:45:40,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:40,635 INFO L276 IsEmpty]: Start isEmpty. Operand 223179 states and 653639 transitions. [2020-12-17 20:45:41,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-17 20:45:41,072 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:41,072 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:45:41,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:41,285 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:41,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:41,286 INFO L82 PathProgramCache]: Analyzing trace with hash 533918017, now seen corresponding path program 69 times [2020-12-17 20:45:41,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:41,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357756197] [2020-12-17 20:45:41,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:41,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357756197] [2020-12-17 20:45:41,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964024594] [2020-12-17 20:45:41,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:41,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-17 20:45:41,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:41,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-17 20:45:41,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:41,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:41,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:41,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-17 20:45:41,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825841076] [2020-12-17 20:45:41,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-17 20:45:41,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:41,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-17 20:45:41,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-12-17 20:45:41,617 INFO L87 Difference]: Start difference. First operand 223179 states and 653639 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:44,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:44,157 INFO L93 Difference]: Finished difference Result 226443 states and 663239 transitions. [2020-12-17 20:45:44,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-17 20:45:44,158 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-12-17 20:45:44,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:44,158 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=883, Invalid=2087, Unknown=0, NotChecked=0, Total=2970 [2020-12-17 20:45:44,158 INFO L78 Accepts]: Start accepts. Automaton has 226443 states and 663239 transitions. Word has length 86 [2020-12-17 20:45:44,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:44,159 INFO L481 AbstractCegarLoop]: Abstraction has 226443 states and 663239 transitions. [2020-12-17 20:45:44,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:44,159 INFO L276 IsEmpty]: Start isEmpty. Operand 226443 states and 663239 transitions. [2020-12-17 20:45:44,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-17 20:45:44,338 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:44,338 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:45:44,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-12-17 20:45:44,539 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:44,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:44,540 INFO L82 PathProgramCache]: Analyzing trace with hash 530944787, now seen corresponding path program 70 times [2020-12-17 20:45:44,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:44,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058647452] [2020-12-17 20:45:44,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:44,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058647452] [2020-12-17 20:45:44,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58552595] [2020-12-17 20:45:44,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:44,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:45:44,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:44,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-17 20:45:44,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:44,877 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:45:44,898 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:44,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:44,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-17 20:45:44,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492678497] [2020-12-17 20:45:44,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-17 20:45:44,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:44,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-17 20:45:44,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-12-17 20:45:44,908 INFO L87 Difference]: Start difference. First operand 226443 states and 663239 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)