/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-New_States.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-12 09:20:41,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-12 09:20:41,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-12 09:20:41,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-12 09:20:41,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-12 09:20:41,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-12 09:20:41,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-12 09:20:41,690 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-12 09:20:41,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-12 09:20:41,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-12 09:20:41,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-12 09:20:41,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-12 09:20:41,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-12 09:20:41,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-12 09:20:41,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-12 09:20:41,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-12 09:20:41,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-12 09:20:41,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-12 09:20:41,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-12 09:20:41,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-12 09:20:41,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-12 09:20:41,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-12 09:20:41,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-12 09:20:41,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-12 09:20:41,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-12 09:20:41,719 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-12 09:20:41,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-12 09:20:41,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-12 09:20:41,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-12 09:20:41,723 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-12 09:20:41,723 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-12 09:20:41,724 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-12 09:20:41,726 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-12 09:20:41,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-12 09:20:41,728 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-12 09:20:41,728 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-12 09:20:41,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-12 09:20:41,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-12 09:20:41,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-12 09:20:41,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-12 09:20:41,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-12 09:20:41,737 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-New_States.epf [2020-11-12 09:20:41,765 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-12 09:20:41,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-12 09:20:41,767 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-12 09:20:41,767 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-12 09:20:41,768 INFO L138 SettingsManager]: * Use SBE=true [2020-11-12 09:20:41,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-12 09:20:41,768 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-12 09:20:41,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-12 09:20:41,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-12 09:20:41,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-12 09:20:41,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-12 09:20:41,769 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-12 09:20:41,769 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-12 09:20:41,770 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-12 09:20:41,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-12 09:20:41,770 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-12 09:20:41,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-12 09:20:41,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-12 09:20:41,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-12 09:20:41,771 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-12 09:20:41,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-12 09:20:41,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-12 09:20:41,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-12 09:20:41,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-12 09:20:41,772 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-12 09:20:41,772 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-12 09:20:41,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-12 09:20:41,773 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-11-12 09:20:41,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-12 09:20:41,773 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-12 09:20:41,773 INFO L138 SettingsManager]: * Sleep set reduction in concurrent analysis=NEW_STATES 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-12 09:20:42,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-12 09:20:42,168 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-12 09:20:42,171 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-12 09:20:42,173 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-12 09:20:42,174 INFO L275 PluginConnector]: CDTParser initialized [2020-11-12 09:20:42,175 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-11-12 09:20:42,283 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/107a0cfd3/449d814cb5da4b419075c2f877ab35db/FLAG742890d8b [2020-11-12 09:20:43,007 INFO L306 CDTParser]: Found 1 translation units. [2020-11-12 09:20:43,010 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-11-12 09:20:43,034 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/107a0cfd3/449d814cb5da4b419075c2f877ab35db/FLAG742890d8b [2020-11-12 09:20:43,259 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/107a0cfd3/449d814cb5da4b419075c2f877ab35db [2020-11-12 09:20:43,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-12 09:20:43,271 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-12 09:20:43,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-12 09:20:43,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-12 09:20:43,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-12 09:20:43,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 09:20:43" (1/1) ... [2020-11-12 09:20:43,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b06fa9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:43, skipping insertion in model container [2020-11-12 09:20:43,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 09:20:43" (1/1) ... [2020-11-12 09:20:43,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-12 09:20:43,374 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-12 09:20:43,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-12 09:20:43,894 INFO L203 MainTranslator]: Completed pre-run [2020-11-12 09:20:43,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-12 09:20:44,093 INFO L208 MainTranslator]: Completed translation [2020-11-12 09:20:44,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:44 WrapperNode [2020-11-12 09:20:44,094 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-12 09:20:44,103 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-12 09:20:44,103 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-12 09:20:44,103 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-12 09:20:44,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:44" (1/1) ... [2020-11-12 09:20:44,154 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:44" (1/1) ... [2020-11-12 09:20:44,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-12 09:20:44,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-12 09:20:44,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-12 09:20:44,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-12 09:20:44,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:44" (1/1) ... [2020-11-12 09:20:44,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:44" (1/1) ... [2020-11-12 09:20:44,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:44" (1/1) ... [2020-11-12 09:20:44,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:44" (1/1) ... [2020-11-12 09:20:44,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:44" (1/1) ... [2020-11-12 09:20:44,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:44" (1/1) ... [2020-11-12 09:20:44,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:44" (1/1) ... [2020-11-12 09:20:44,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-12 09:20:44,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-12 09:20:44,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-12 09:20:44,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-12 09:20:44,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:44" (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 [2020-11-12 09:20:44,357 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-12 09:20:44,357 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-12 09:20:44,357 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-12 09:20:44,357 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-12 09:20:44,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-12 09:20:44,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-12 09:20:44,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-12 09:20:44,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-12 09:20:44,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-12 09:20:44,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-12 09:20:44,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-12 09:20:44,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-12 09:20:44,361 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-12 09:20:44,784 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-12 09:20:44,784 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-12 09:20:44,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 09:20:44 BoogieIcfgContainer [2020-11-12 09:20:44,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-12 09:20:44,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-12 09:20:44,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-12 09:20:44,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-12 09:20:44,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 09:20:43" (1/3) ... [2020-11-12 09:20:44,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@89b72aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 09:20:44, skipping insertion in model container [2020-11-12 09:20:44,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:20:44" (2/3) ... [2020-11-12 09:20:44,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@89b72aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 09:20:44, skipping insertion in model container [2020-11-12 09:20:44,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 09:20:44" (3/3) ... [2020-11-12 09:20:44,794 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2020-11-12 09:20:44,809 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-12 09:20:44,810 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-12 09:20:44,813 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-12 09:20:44,814 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-12 09:20:44,847 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,847 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,847 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,847 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,848 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,848 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,848 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,848 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,849 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,849 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,849 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,849 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,850 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,850 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,850 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,850 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,851 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,851 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,851 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,851 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,851 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,852 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,852 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,852 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,852 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,852 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,853 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,853 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,853 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,853 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,854 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,854 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,854 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,854 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,855 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,855 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,855 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,855 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,855 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,856 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,856 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,856 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,856 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,857 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,857 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,857 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,857 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,857 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,858 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,858 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,858 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,858 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,859 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,859 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,859 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,859 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,859 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,860 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,860 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,860 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,862 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,863 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,863 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,863 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,863 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,863 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,870 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,870 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,871 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,871 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,871 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,871 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:20:44,874 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-12 09:20:44,886 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-12 09:20:44,911 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-12 09:20:44,911 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-12 09:20:44,911 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-12 09:20:44,912 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-12 09:20:44,912 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-12 09:20:44,912 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-12 09:20:44,912 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-12 09:20:44,912 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-12 09:20:44,925 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 66 transitions, 142 flow [2020-11-12 09:20:45,096 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:45,384 WARN L455 BasicCegarLoop]: Sleep Set Reduction Time: 281ms [2020-11-12 09:20:45,393 WARN L456 BasicCegarLoop]: Sleep set: input automaton has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:45,411 WARN L457 BasicCegarLoop]: Sleep set: output automaton has 7179 states, 6395 states have (on average 1.1964034401876467) internal successors, (7651), 7178 states have internal predecessors, (7651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:45,429 INFO L276 IsEmpty]: Start isEmpty. Operand has 7179 states, 6395 states have (on average 1.1964034401876467) internal successors, (7651), 7178 states have internal predecessors, (7651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:45,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-12 09:20:45,442 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:45,443 INFO L494 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] [2020-11-12 09:20:45,444 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:45,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:45,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1113047899, now seen corresponding path program 1 times [2020-11-12 09:20:45,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:45,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342907292] [2020-11-12 09:20:45,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:20:45,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342907292] [2020-11-12 09:20:46,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 09:20:46,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-12 09:20:46,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013714162] [2020-11-12 09:20:46,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-12 09:20:46,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:46,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-12 09:20:46,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-12 09:20:46,039 INFO L87 Difference]: Start difference. First operand has 7179 states, 6395 states have (on average 1.1964034401876467) internal successors, (7651), 7178 states have internal predecessors, (7651), 0 states have call successors, (0), 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) [2020-11-12 09:20:46,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:46,248 INFO L93 Difference]: Finished difference Result 4286 states and 4935 transitions. [2020-11-12 09:20:46,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-12 09:20:46,250 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 [2020-11-12 09:20:46,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:46,283 INFO L225 Difference]: With dead ends: 4286 [2020-11-12 09:20:46,283 INFO L226 Difference]: Without dead ends: 1578 [2020-11-12 09:20:46,285 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-11-12 09:20:46,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2020-11-12 09:20:46,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1220. [2020-11-12 09:20:46,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1108 states have (on average 1.385379061371841) internal successors, (1535), 1219 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1535 transitions. [2020-11-12 09:20:46,441 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1535 transitions. Word has length 28 [2020-11-12 09:20:46,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:46,442 INFO L481 AbstractCegarLoop]: Abstraction has 1220 states and 1535 transitions. [2020-11-12 09:20:46,442 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) [2020-11-12 09:20:46,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1535 transitions. [2020-11-12 09:20:46,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-12 09:20:46,447 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:46,448 INFO L494 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] [2020-11-12 09:20:46,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-12 09:20:46,448 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:46,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:46,450 INFO L82 PathProgramCache]: Analyzing trace with hash 883557971, now seen corresponding path program 1 times [2020-11-12 09:20:46,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:46,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495019582] [2020-11-12 09:20:46,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:20:46,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495019582] [2020-11-12 09:20:46,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 09:20:46,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-12 09:20:46,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994064344] [2020-11-12 09:20:46,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-12 09:20:46,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:46,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-12 09:20:46,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-12 09:20:46,708 INFO L87 Difference]: Start difference. First operand 1220 states and 1535 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:46,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:46,875 INFO L93 Difference]: Finished difference Result 2056 states and 2477 transitions. [2020-11-12 09:20:46,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-12 09:20:46,876 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2020-11-12 09:20:46,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:46,886 INFO L225 Difference]: With dead ends: 2056 [2020-11-12 09:20:46,886 INFO L226 Difference]: Without dead ends: 1652 [2020-11-12 09:20:46,887 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-11-12 09:20:46,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2020-11-12 09:20:46,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1246. [2020-11-12 09:20:46,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1134 states have (on average 1.3818342151675485) internal successors, (1567), 1245 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:47,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 1567 transitions. [2020-11-12 09:20:47,006 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 1567 transitions. Word has length 33 [2020-11-12 09:20:47,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:47,007 INFO L481 AbstractCegarLoop]: Abstraction has 1246 states and 1567 transitions. [2020-11-12 09:20:47,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:47,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 1567 transitions. [2020-11-12 09:20:47,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-12 09:20:47,009 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:47,009 INFO L494 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] [2020-11-12 09:20:47,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-12 09:20:47,010 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:47,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:47,013 INFO L82 PathProgramCache]: Analyzing trace with hash -31625489, now seen corresponding path program 1 times [2020-11-12 09:20:47,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:47,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364462669] [2020-11-12 09:20:47,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:20:47,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364462669] [2020-11-12 09:20:47,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 09:20:47,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-12 09:20:47,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209073597] [2020-11-12 09:20:47,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-12 09:20:47,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:47,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-12 09:20:47,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-12 09:20:47,209 INFO L87 Difference]: Start difference. First operand 1246 states and 1567 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:47,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:47,396 INFO L93 Difference]: Finished difference Result 2162 states and 2586 transitions. [2020-11-12 09:20:47,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-12 09:20:47,397 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2020-11-12 09:20:47,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:47,406 INFO L225 Difference]: With dead ends: 2162 [2020-11-12 09:20:47,406 INFO L226 Difference]: Without dead ends: 1694 [2020-11-12 09:20:47,407 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-11-12 09:20:47,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2020-11-12 09:20:47,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1314. [2020-11-12 09:20:47,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1202 states have (on average 1.3635607321131447) internal successors, (1639), 1313 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:47,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 1639 transitions. [2020-11-12 09:20:47,457 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 1639 transitions. Word has length 33 [2020-11-12 09:20:47,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:47,458 INFO L481 AbstractCegarLoop]: Abstraction has 1314 states and 1639 transitions. [2020-11-12 09:20:47,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:47,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 1639 transitions. [2020-11-12 09:20:47,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-12 09:20:47,461 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:47,461 INFO L494 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] [2020-11-12 09:20:47,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-12 09:20:47,461 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:47,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:47,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1463751740, now seen corresponding path program 1 times [2020-11-12 09:20:47,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:47,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629662855] [2020-11-12 09:20:47,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:20:47,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629662855] [2020-11-12 09:20:47,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284871801] [2020-11-12 09:20:47,697 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 [2020-11-12 09:20:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:47,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-12 09:20:47,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:20:47,941 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:47,973 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:47,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:20:47,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:20:47,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-11-12 09:20:47,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114761007] [2020-11-12 09:20:47,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-12 09:20:47,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:47,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-12 09:20:47,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-11-12 09:20:47,985 INFO L87 Difference]: Start difference. First operand 1314 states and 1639 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:48,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:48,263 INFO L93 Difference]: Finished difference Result 2518 states and 3063 transitions. [2020-11-12 09:20:48,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-12 09:20:48,264 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2020-11-12 09:20:48,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:48,273 INFO L225 Difference]: With dead ends: 2518 [2020-11-12 09:20:48,274 INFO L226 Difference]: Without dead ends: 1858 [2020-11-12 09:20:48,274 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:20:48,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2020-11-12 09:20:48,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1324. [2020-11-12 09:20:48,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1212 states have (on average 1.3704620462046204) internal successors, (1661), 1323 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:48,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 1661 transitions. [2020-11-12 09:20:48,320 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 1661 transitions. Word has length 38 [2020-11-12 09:20:48,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:48,320 INFO L481 AbstractCegarLoop]: Abstraction has 1324 states and 1661 transitions. [2020-11-12 09:20:48,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:48,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 1661 transitions. [2020-11-12 09:20:48,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-12 09:20:48,323 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:48,323 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:20:48,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:20:48,537 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:48,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:48,538 INFO L82 PathProgramCache]: Analyzing trace with hash -166312201, now seen corresponding path program 1 times [2020-11-12 09:20:48,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:48,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952401962] [2020-11-12 09:20:48,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:20:48,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952401962] [2020-11-12 09:20:48,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 09:20:48,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-12 09:20:48,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055424548] [2020-11-12 09:20:48,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-12 09:20:48,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:48,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-12 09:20:48,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-12 09:20:48,681 INFO L87 Difference]: Start difference. First operand 1324 states and 1661 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:48,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:48,924 INFO L93 Difference]: Finished difference Result 2407 states and 3002 transitions. [2020-11-12 09:20:48,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-12 09:20:48,925 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2020-11-12 09:20:48,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:48,934 INFO L225 Difference]: With dead ends: 2407 [2020-11-12 09:20:48,935 INFO L226 Difference]: Without dead ends: 1963 [2020-11-12 09:20:48,935 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-11-12 09:20:48,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2020-11-12 09:20:48,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1416. [2020-11-12 09:20:48,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1304 states have (on average 1.357361963190184) internal successors, (1770), 1415 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:48,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 1770 transitions. [2020-11-12 09:20:48,978 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 1770 transitions. Word has length 38 [2020-11-12 09:20:48,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:48,979 INFO L481 AbstractCegarLoop]: Abstraction has 1416 states and 1770 transitions. [2020-11-12 09:20:48,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:48,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 1770 transitions. [2020-11-12 09:20:48,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-12 09:20:48,981 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:48,982 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:20:48,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-12 09:20:48,982 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:48,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:48,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1418492519, now seen corresponding path program 2 times [2020-11-12 09:20:48,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:48,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630565873] [2020-11-12 09:20:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:49,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:20:49,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630565873] [2020-11-12 09:20:49,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 09:20:49,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-12 09:20:49,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159854785] [2020-11-12 09:20:49,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-12 09:20:49,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:49,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-12 09:20:49,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-12 09:20:49,137 INFO L87 Difference]: Start difference. First operand 1416 states and 1770 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:49,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:49,381 INFO L93 Difference]: Finished difference Result 2616 states and 3106 transitions. [2020-11-12 09:20:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-12 09:20:49,382 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2020-11-12 09:20:49,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:49,392 INFO L225 Difference]: With dead ends: 2616 [2020-11-12 09:20:49,392 INFO L226 Difference]: Without dead ends: 1934 [2020-11-12 09:20:49,393 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-11-12 09:20:49,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1934 states. [2020-11-12 09:20:49,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1934 to 1483. [2020-11-12 09:20:49,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1371 states have (on average 1.3471918307804522) internal successors, (1847), 1482 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:49,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 1847 transitions. [2020-11-12 09:20:49,439 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 1847 transitions. Word has length 38 [2020-11-12 09:20:49,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:49,439 INFO L481 AbstractCegarLoop]: Abstraction has 1483 states and 1847 transitions. [2020-11-12 09:20:49,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:49,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 1847 transitions. [2020-11-12 09:20:49,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-12 09:20:49,441 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:49,442 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:20:49,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-12 09:20:49,442 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:49,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:49,453 INFO L82 PathProgramCache]: Analyzing trace with hash 643440678, now seen corresponding path program 1 times [2020-11-12 09:20:49,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:49,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308553521] [2020-11-12 09:20:49,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:20:49,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308553521] [2020-11-12 09:20:49,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006895477] [2020-11-12 09:20:49,687 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 [2020-11-12 09:20:49,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:49,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-12 09:20:49,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:20:49,876 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:20:49,930 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:20:49,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:20:49,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-12 09:20:49,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350263875] [2020-11-12 09:20:49,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-12 09:20:49,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:49,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-12 09:20:49,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-11-12 09:20:49,940 INFO L87 Difference]: Start difference. First operand 1483 states and 1847 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:50,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:50,422 INFO L93 Difference]: Finished difference Result 2984 states and 3775 transitions. [2020-11-12 09:20:50,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-12 09:20:50,423 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2020-11-12 09:20:50,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:50,434 INFO L225 Difference]: With dead ends: 2984 [2020-11-12 09:20:50,434 INFO L226 Difference]: Without dead ends: 2267 [2020-11-12 09:20:50,435 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2020-11-12 09:20:50,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2020-11-12 09:20:50,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 1502. [2020-11-12 09:20:50,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1390 states have (on average 1.3517985611510792) internal successors, (1879), 1501 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:50,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 1879 transitions. [2020-11-12 09:20:50,481 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 1879 transitions. Word has length 43 [2020-11-12 09:20:50,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:50,481 INFO L481 AbstractCegarLoop]: Abstraction has 1502 states and 1879 transitions. [2020-11-12 09:20:50,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:50,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 1879 transitions. [2020-11-12 09:20:50,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-12 09:20:50,483 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:50,484 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:20:50,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:20:50,697 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:50,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:50,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1643454454, now seen corresponding path program 1 times [2020-11-12 09:20:50,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:50,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126151414] [2020-11-12 09:20:50,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:50,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:20:50,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126151414] [2020-11-12 09:20:50,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786980425] [2020-11-12 09:20:50,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:20:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:50,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-12 09:20:50,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:20:51,009 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:20:51,023 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:51,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:20:51,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:20:51,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-12 09:20:51,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069617931] [2020-11-12 09:20:51,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-12 09:20:51,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:51,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-12 09:20:51,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-11-12 09:20:51,033 INFO L87 Difference]: Start difference. First operand 1502 states and 1879 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:51,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:51,748 INFO L93 Difference]: Finished difference Result 3838 states and 4745 transitions. [2020-11-12 09:20:51,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-12 09:20:51,748 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2020-11-12 09:20:51,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:51,760 INFO L225 Difference]: With dead ends: 3838 [2020-11-12 09:20:51,761 INFO L226 Difference]: Without dead ends: 2485 [2020-11-12 09:20:51,762 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=306, Invalid=1026, Unknown=0, NotChecked=0, Total=1332 [2020-11-12 09:20:51,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2020-11-12 09:20:51,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 1684. [2020-11-12 09:20:51,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1572 states have (on average 1.3193384223918576) internal successors, (2074), 1683 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:51,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 2074 transitions. [2020-11-12 09:20:51,813 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 2074 transitions. Word has length 43 [2020-11-12 09:20:51,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:51,813 INFO L481 AbstractCegarLoop]: Abstraction has 1684 states and 2074 transitions. [2020-11-12 09:20:51,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:51,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 2074 transitions. [2020-11-12 09:20:51,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 09:20:51,817 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:51,817 INFO L494 BasicCegarLoop]: trace histogram [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] [2020-11-12 09:20:52,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:20:52,031 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:52,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:52,032 INFO L82 PathProgramCache]: Analyzing trace with hash -160149212, now seen corresponding path program 2 times [2020-11-12 09:20:52,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:52,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367978848] [2020-11-12 09:20:52,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:52,269 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:20:52,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367978848] [2020-11-12 09:20:52,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333903905] [2020-11-12 09:20:52,270 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 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 [2020-11-12 09:20:52,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:20:52,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:20:52,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 09:20:52,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:20:52,480 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:52,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:20:52,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:20:52,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-11-12 09:20:52,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49252261] [2020-11-12 09:20:52,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-12 09:20:52,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:52,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-12 09:20:52,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-12 09:20:52,520 INFO L87 Difference]: Start difference. First operand 1684 states and 2074 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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) [2020-11-12 09:20:52,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:52,842 INFO L93 Difference]: Finished difference Result 2980 states and 3603 transitions. [2020-11-12 09:20:52,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-12 09:20:52,843 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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 48 [2020-11-12 09:20:52,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:52,853 INFO L225 Difference]: With dead ends: 2980 [2020-11-12 09:20:52,854 INFO L226 Difference]: Without dead ends: 2320 [2020-11-12 09:20:52,854 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2020-11-12 09:20:52,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2020-11-12 09:20:52,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1694. [2020-11-12 09:20:52,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1582 states have (on average 1.324905183312263) internal successors, (2096), 1693 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:52,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 2096 transitions. [2020-11-12 09:20:52,900 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 2096 transitions. Word has length 48 [2020-11-12 09:20:52,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:52,901 INFO L481 AbstractCegarLoop]: Abstraction has 1694 states and 2096 transitions. [2020-11-12 09:20:52,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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) [2020-11-12 09:20:52,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 2096 transitions. [2020-11-12 09:20:52,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 09:20:52,903 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:52,904 INFO L494 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, 1, 1] [2020-11-12 09:20:53,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:20:53,116 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:53,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:53,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1137290327, now seen corresponding path program 2 times [2020-11-12 09:20:53,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:53,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711070163] [2020-11-12 09:20:53,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:53,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:20:53,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711070163] [2020-11-12 09:20:53,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623716405] [2020-11-12 09:20:53,257 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 [2020-11-12 09:20:53,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:20:53,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:20:53,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 09:20:53,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:20:53,483 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:20:53,526 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:53,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:20:53,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:20:53,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-12 09:20:53,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761806431] [2020-11-12 09:20:53,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-12 09:20:53,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:53,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-12 09:20:53,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-11-12 09:20:53,537 INFO L87 Difference]: Start difference. First operand 1694 states and 2096 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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) [2020-11-12 09:20:54,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:54,122 INFO L93 Difference]: Finished difference Result 3399 states and 4258 transitions. [2020-11-12 09:20:54,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-12 09:20:54,122 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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 48 [2020-11-12 09:20:54,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:54,134 INFO L225 Difference]: With dead ends: 3399 [2020-11-12 09:20:54,134 INFO L226 Difference]: Without dead ends: 2682 [2020-11-12 09:20:54,135 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2020-11-12 09:20:54,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2020-11-12 09:20:54,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1708. [2020-11-12 09:20:54,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1596 states have (on average 1.3264411027568923) internal successors, (2117), 1707 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:54,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 2117 transitions. [2020-11-12 09:20:54,197 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 2117 transitions. Word has length 48 [2020-11-12 09:20:54,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:54,197 INFO L481 AbstractCegarLoop]: Abstraction has 1708 states and 2117 transitions. [2020-11-12 09:20:54,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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) [2020-11-12 09:20:54,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 2117 transitions. [2020-11-12 09:20:54,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 09:20:54,199 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:54,200 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:20:54,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-12 09:20:54,414 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:54,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:54,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1149604805, now seen corresponding path program 1 times [2020-11-12 09:20:54,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:54,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413854865] [2020-11-12 09:20:54,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:20:54,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413854865] [2020-11-12 09:20:54,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821765571] [2020-11-12 09:20:54,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-11-12 09:20:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:54,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 09:20:54,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:20:54,779 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:20:54,828 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:20:54,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:20:54,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-12 09:20:54,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308078288] [2020-11-12 09:20:54,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-12 09:20:54,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:54,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-12 09:20:54,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-11-12 09:20:54,842 INFO L87 Difference]: Start difference. First operand 1708 states and 2117 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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) [2020-11-12 09:20:55,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:55,640 INFO L93 Difference]: Finished difference Result 3537 states and 4421 transitions. [2020-11-12 09:20:55,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-12 09:20:55,640 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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 48 [2020-11-12 09:20:55,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:55,651 INFO L225 Difference]: With dead ends: 3537 [2020-11-12 09:20:55,651 INFO L226 Difference]: Without dead ends: 2820 [2020-11-12 09:20:55,654 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=336, Invalid=1146, Unknown=0, NotChecked=0, Total=1482 [2020-11-12 09:20:55,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2020-11-12 09:20:55,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 1710. [2020-11-12 09:20:55,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1598 states have (on average 1.3285356695869837) internal successors, (2123), 1709 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:55,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 2123 transitions. [2020-11-12 09:20:55,699 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 2123 transitions. Word has length 48 [2020-11-12 09:20:55,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:55,699 INFO L481 AbstractCegarLoop]: Abstraction has 1710 states and 2123 transitions. [2020-11-12 09:20:55,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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) [2020-11-12 09:20:55,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 2123 transitions. [2020-11-12 09:20:55,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 09:20:55,701 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:55,702 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:20:55,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:20:55,918 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:55,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:55,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1684291189, now seen corresponding path program 2 times [2020-11-12 09:20:55,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:55,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232348387] [2020-11-12 09:20:55,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:20:56,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232348387] [2020-11-12 09:20:56,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312559763] [2020-11-12 09:20:56,065 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 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 [2020-11-12 09:20:56,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:20:56,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:20:56,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 09:20:56,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:20:56,273 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:56,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:20:56,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:20:56,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-12 09:20:56,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416631911] [2020-11-12 09:20:56,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-12 09:20:56,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:56,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-12 09:20:56,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-11-12 09:20:56,284 INFO L87 Difference]: Start difference. First operand 1710 states and 2123 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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) [2020-11-12 09:20:56,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:56,706 INFO L93 Difference]: Finished difference Result 2685 states and 3267 transitions. [2020-11-12 09:20:56,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-12 09:20:56,707 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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 48 [2020-11-12 09:20:56,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:56,715 INFO L225 Difference]: With dead ends: 2685 [2020-11-12 09:20:56,715 INFO L226 Difference]: Without dead ends: 2527 [2020-11-12 09:20:56,715 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2020-11-12 09:20:56,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2020-11-12 09:20:56,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 1770. [2020-11-12 09:20:56,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1658 states have (on average 1.327503015681544) internal successors, (2201), 1769 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:56,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 2201 transitions. [2020-11-12 09:20:56,758 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 2201 transitions. Word has length 48 [2020-11-12 09:20:56,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:56,758 INFO L481 AbstractCegarLoop]: Abstraction has 1770 states and 2201 transitions. [2020-11-12 09:20:56,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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) [2020-11-12 09:20:56,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 2201 transitions. [2020-11-12 09:20:56,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 09:20:56,761 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:56,761 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:20:56,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:20:56,977 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:56,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:56,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1123361077, now seen corresponding path program 3 times [2020-11-12 09:20:56,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:56,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706608280] [2020-11-12 09:20:56,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:20:57,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706608280] [2020-11-12 09:20:57,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084793711] [2020-11-12 09:20:57,135 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 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 [2020-11-12 09:20:57,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-12 09:20:57,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:20:57,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 09:20:57,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:20:57,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:20:57,344 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:20:57,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:20:57,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-12 09:20:57,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335983340] [2020-11-12 09:20:57,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-12 09:20:57,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:57,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-12 09:20:57,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-11-12 09:20:57,355 INFO L87 Difference]: Start difference. First operand 1770 states and 2201 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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) [2020-11-12 09:20:58,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:58,422 INFO L93 Difference]: Finished difference Result 4017 states and 4892 transitions. [2020-11-12 09:20:58,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-12 09:20:58,423 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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 48 [2020-11-12 09:20:58,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:58,435 INFO L225 Difference]: With dead ends: 4017 [2020-11-12 09:20:58,435 INFO L226 Difference]: Without dead ends: 3039 [2020-11-12 09:20:58,436 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=488, Invalid=1674, Unknown=0, NotChecked=0, Total=2162 [2020-11-12 09:20:58,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3039 states. [2020-11-12 09:20:58,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3039 to 1869. [2020-11-12 09:20:58,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1757 states have (on average 1.3158793397837223) internal successors, (2312), 1868 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:58,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2312 transitions. [2020-11-12 09:20:58,479 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2312 transitions. Word has length 48 [2020-11-12 09:20:58,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:58,479 INFO L481 AbstractCegarLoop]: Abstraction has 1869 states and 2312 transitions. [2020-11-12 09:20:58,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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) [2020-11-12 09:20:58,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2312 transitions. [2020-11-12 09:20:58,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 09:20:58,482 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:58,482 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:20:58,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-12 09:20:58,696 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:20:58,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:20:58,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1842288326, now seen corresponding path program 3 times [2020-11-12 09:20:58,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:20:58,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200240947] [2020-11-12 09:20:58,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:20:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:20:58,877 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:20:58,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200240947] [2020-11-12 09:20:58,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67475114] [2020-11-12 09:20:58,878 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 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 [2020-11-12 09:20:58,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 09:20:58,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:20:58,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 09:20:58,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:20:59,153 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:20:59,195 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:20:59,209 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:20:59,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:20:59,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 09:20:59,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639869156] [2020-11-12 09:20:59,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 09:20:59,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:20:59,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 09:20:59,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-11-12 09:20:59,212 INFO L87 Difference]: Start difference. First operand 1869 states and 2312 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:59,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:20:59,889 INFO L93 Difference]: Finished difference Result 3723 states and 4635 transitions. [2020-11-12 09:20:59,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-12 09:20:59,889 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 09:20:59,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:20:59,896 INFO L225 Difference]: With dead ends: 3723 [2020-11-12 09:20:59,896 INFO L226 Difference]: Without dead ends: 3006 [2020-11-12 09:20:59,897 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=980, Unknown=0, NotChecked=0, Total=1260 [2020-11-12 09:20:59,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3006 states. [2020-11-12 09:20:59,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3006 to 1890. [2020-11-12 09:20:59,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1778 states have (on average 1.3194600674915635) internal successors, (2346), 1889 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:59,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2346 transitions. [2020-11-12 09:20:59,947 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2346 transitions. Word has length 53 [2020-11-12 09:20:59,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:20:59,947 INFO L481 AbstractCegarLoop]: Abstraction has 1890 states and 2346 transitions. [2020-11-12 09:20:59,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:20:59,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2346 transitions. [2020-11-12 09:20:59,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 09:20:59,950 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:20:59,950 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:21:00,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:00,166 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:00,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:00,167 INFO L82 PathProgramCache]: Analyzing trace with hash -444606806, now seen corresponding path program 4 times [2020-11-12 09:21:00,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:00,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335486053] [2020-11-12 09:21:00,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:00,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335486053] [2020-11-12 09:21:00,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62070113] [2020-11-12 09:21:00,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 09:21:00,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:21:00,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:00,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:21:00,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:00,627 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:21:00,694 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:00,698 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:00,708 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:00,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:00,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-12 09:21:00,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635392142] [2020-11-12 09:21:00,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 09:21:00,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:00,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 09:21:00,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-11-12 09:21:00,763 INFO L87 Difference]: Start difference. First operand 1890 states and 2346 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:01,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:01,931 INFO L93 Difference]: Finished difference Result 4435 states and 5528 transitions. [2020-11-12 09:21:01,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-12 09:21:01,932 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 09:21:01,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:01,939 INFO L225 Difference]: With dead ends: 4435 [2020-11-12 09:21:01,939 INFO L226 Difference]: Without dead ends: 3378 [2020-11-12 09:21:01,941 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=468, Invalid=1788, Unknown=0, NotChecked=0, Total=2256 [2020-11-12 09:21:01,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3378 states. [2020-11-12 09:21:01,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3378 to 1869. [2020-11-12 09:21:01,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1757 states have (on average 1.330108138873079) internal successors, (2337), 1868 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:01,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2337 transitions. [2020-11-12 09:21:01,990 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2337 transitions. Word has length 53 [2020-11-12 09:21:01,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:01,990 INFO L481 AbstractCegarLoop]: Abstraction has 1869 states and 2337 transitions. [2020-11-12 09:21:01,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:01,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2337 transitions. [2020-11-12 09:21:01,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 09:21:01,993 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:01,993 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:21:02,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-12 09:21:02,207 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:02,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:02,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1905678108, now seen corresponding path program 5 times [2020-11-12 09:21:02,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:02,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843858391] [2020-11-12 09:21:02,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:02,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843858391] [2020-11-12 09:21:02,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254433146] [2020-11-12 09:21:02,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:02,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-12 09:21:02,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:02,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 09:21:02,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:02,703 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:02,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:02,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 09:21:02,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382456818] [2020-11-12 09:21:02,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 09:21:02,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:02,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 09:21:02,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-11-12 09:21:02,715 INFO L87 Difference]: Start difference. First operand 1869 states and 2337 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:03,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:03,324 INFO L93 Difference]: Finished difference Result 2931 states and 3549 transitions. [2020-11-12 09:21:03,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-12 09:21:03,324 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 09:21:03,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:03,330 INFO L225 Difference]: With dead ends: 2931 [2020-11-12 09:21:03,330 INFO L226 Difference]: Without dead ends: 2773 [2020-11-12 09:21:03,331 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2020-11-12 09:21:03,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2773 states. [2020-11-12 09:21:03,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2773 to 1870. [2020-11-12 09:21:03,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1758 states have (on average 1.3304891922639364) internal successors, (2339), 1869 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:03,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2339 transitions. [2020-11-12 09:21:03,380 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2339 transitions. Word has length 53 [2020-11-12 09:21:03,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:03,381 INFO L481 AbstractCegarLoop]: Abstraction has 1870 states and 2339 transitions. [2020-11-12 09:21:03,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:03,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2339 transitions. [2020-11-12 09:21:03,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 09:21:03,392 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:03,392 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:21:03,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-12 09:21:03,606 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:03,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:03,606 INFO L82 PathProgramCache]: Analyzing trace with hash -418363078, now seen corresponding path program 6 times [2020-11-12 09:21:03,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:03,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014785416] [2020-11-12 09:21:03,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:03,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014785416] [2020-11-12 09:21:03,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315670079] [2020-11-12 09:21:03,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:03,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 09:21:03,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:03,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 09:21:03,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:04,077 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:21:04,198 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:04,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:04,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-12 09:21:04,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709092273] [2020-11-12 09:21:04,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 09:21:04,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:04,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 09:21:04,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-11-12 09:21:04,241 INFO L87 Difference]: Start difference. First operand 1870 states and 2339 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:06,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:06,003 INFO L93 Difference]: Finished difference Result 4509 states and 5554 transitions. [2020-11-12 09:21:06,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-12 09:21:06,003 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 09:21:06,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:06,009 INFO L225 Difference]: With dead ends: 4509 [2020-11-12 09:21:06,009 INFO L226 Difference]: Without dead ends: 3469 [2020-11-12 09:21:06,010 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=621, Invalid=2241, Unknown=0, NotChecked=0, Total=2862 [2020-11-12 09:21:06,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2020-11-12 09:21:06,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 1860. [2020-11-12 09:21:06,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1748 states have (on average 1.3255148741418765) internal successors, (2317), 1859 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:06,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 2317 transitions. [2020-11-12 09:21:06,053 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 2317 transitions. Word has length 53 [2020-11-12 09:21:06,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:06,053 INFO L481 AbstractCegarLoop]: Abstraction has 1860 states and 2317 transitions. [2020-11-12 09:21:06,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:06,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 2317 transitions. [2020-11-12 09:21:06,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 09:21:06,056 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:06,056 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:21:06,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-12 09:21:06,272 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:06,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:06,273 INFO L82 PathProgramCache]: Analyzing trace with hash -909394442, now seen corresponding path program 7 times [2020-11-12 09:21:06,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:06,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423198464] [2020-11-12 09:21:06,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:06,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423198464] [2020-11-12 09:21:06,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843081147] [2020-11-12 09:21:06,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:06,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 09:21:06,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:06,685 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:06,719 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:06,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:06,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-12 09:21:06,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013425428] [2020-11-12 09:21:06,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 09:21:06,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:06,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 09:21:06,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-11-12 09:21:06,755 INFO L87 Difference]: Start difference. First operand 1860 states and 2317 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:08,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:08,553 INFO L93 Difference]: Finished difference Result 5687 states and 6848 transitions. [2020-11-12 09:21:08,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-11-12 09:21:08,554 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 09:21:08,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:08,562 INFO L225 Difference]: With dead ends: 5687 [2020-11-12 09:21:08,562 INFO L226 Difference]: Without dead ends: 3801 [2020-11-12 09:21:08,563 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=803, Invalid=2979, Unknown=0, NotChecked=0, Total=3782 [2020-11-12 09:21:08,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2020-11-12 09:21:08,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 2099. [2020-11-12 09:21:08,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2099 states, 1987 states have (on average 1.2989431303472572) internal successors, (2581), 2098 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:08,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 2581 transitions. [2020-11-12 09:21:08,608 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 2581 transitions. Word has length 53 [2020-11-12 09:21:08,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:08,609 INFO L481 AbstractCegarLoop]: Abstraction has 2099 states and 2581 transitions. [2020-11-12 09:21:08,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:08,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 2581 transitions. [2020-11-12 09:21:08,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 09:21:08,611 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:08,612 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:21:08,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-12 09:21:08,825 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:08,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:08,827 INFO L82 PathProgramCache]: Analyzing trace with hash 76691020, now seen corresponding path program 8 times [2020-11-12 09:21:08,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:08,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757490804] [2020-11-12 09:21:08,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:09,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:09,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757490804] [2020-11-12 09:21:09,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61959259] [2020-11-12 09:21:09,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:09,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:21:09,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:09,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 09:21:09,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:09,282 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:09,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:09,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 09:21:09,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607861788] [2020-11-12 09:21:09,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 09:21:09,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:09,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 09:21:09,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-11-12 09:21:09,292 INFO L87 Difference]: Start difference. First operand 2099 states and 2581 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:09,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:09,859 INFO L93 Difference]: Finished difference Result 3232 states and 3915 transitions. [2020-11-12 09:21:09,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-12 09:21:09,860 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 09:21:09,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:09,866 INFO L225 Difference]: With dead ends: 3232 [2020-11-12 09:21:09,866 INFO L226 Difference]: Without dead ends: 3074 [2020-11-12 09:21:09,867 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2020-11-12 09:21:09,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2020-11-12 09:21:09,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 2116. [2020-11-12 09:21:09,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2004 states have (on average 1.3033932135728543) internal successors, (2612), 2115 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:09,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 2612 transitions. [2020-11-12 09:21:09,910 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 2612 transitions. Word has length 53 [2020-11-12 09:21:09,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:09,910 INFO L481 AbstractCegarLoop]: Abstraction has 2116 states and 2612 transitions. [2020-11-12 09:21:09,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:09,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 2612 transitions. [2020-11-12 09:21:09,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 09:21:09,913 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:09,913 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:21:10,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:10,126 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:10,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:10,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1993990484, now seen corresponding path program 9 times [2020-11-12 09:21:10,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:10,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140319700] [2020-11-12 09:21:10,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:10,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:10,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140319700] [2020-11-12 09:21:10,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785857310] [2020-11-12 09:21:10,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:10,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-12 09:21:10,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:10,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 09:21:10,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:10,560 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:10,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:10,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:10,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 09:21:10,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935894682] [2020-11-12 09:21:10,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 09:21:10,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:10,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 09:21:10,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-11-12 09:21:10,572 INFO L87 Difference]: Start difference. First operand 2116 states and 2612 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:11,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:11,368 INFO L93 Difference]: Finished difference Result 3264 states and 3948 transitions. [2020-11-12 09:21:11,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-12 09:21:11,369 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 09:21:11,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:11,373 INFO L225 Difference]: With dead ends: 3264 [2020-11-12 09:21:11,373 INFO L226 Difference]: Without dead ends: 3106 [2020-11-12 09:21:11,373 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=314, Invalid=1018, Unknown=0, NotChecked=0, Total=1332 [2020-11-12 09:21:11,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3106 states. [2020-11-12 09:21:11,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3106 to 2121. [2020-11-12 09:21:11,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2009 states have (on average 1.3056246888999503) internal successors, (2623), 2120 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:11,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 2623 transitions. [2020-11-12 09:21:11,413 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 2623 transitions. Word has length 53 [2020-11-12 09:21:11,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:11,413 INFO L481 AbstractCegarLoop]: Abstraction has 2121 states and 2623 transitions. [2020-11-12 09:21:11,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:11,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 2623 transitions. [2020-11-12 09:21:11,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 09:21:11,416 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:11,416 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:21:11,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:11,630 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:11,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:11,630 INFO L82 PathProgramCache]: Analyzing trace with hash -813661782, now seen corresponding path program 10 times [2020-11-12 09:21:11,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:11,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083817502] [2020-11-12 09:21:11,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:11,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083817502] [2020-11-12 09:21:11,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002833227] [2020-11-12 09:21:11,817 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 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 [2020-11-12 09:21:11,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:21:11,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:11,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:21:11,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:12,060 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:21:12,120 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:12,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:12,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-12 09:21:12,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769169670] [2020-11-12 09:21:12,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 09:21:12,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:12,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 09:21:12,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-11-12 09:21:12,166 INFO L87 Difference]: Start difference. First operand 2121 states and 2623 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:13,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:13,821 INFO L93 Difference]: Finished difference Result 4978 states and 6007 transitions. [2020-11-12 09:21:13,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-12 09:21:13,822 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 09:21:13,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:13,826 INFO L225 Difference]: With dead ends: 4978 [2020-11-12 09:21:13,826 INFO L226 Difference]: Without dead ends: 3984 [2020-11-12 09:21:13,827 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=722, Invalid=2584, Unknown=0, NotChecked=0, Total=3306 [2020-11-12 09:21:13,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3984 states. [2020-11-12 09:21:13,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3984 to 2130. [2020-11-12 09:21:13,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2130 states, 2018 states have (on average 1.308721506442022) internal successors, (2641), 2129 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:13,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2130 states to 2130 states and 2641 transitions. [2020-11-12 09:21:13,868 INFO L78 Accepts]: Start accepts. Automaton has 2130 states and 2641 transitions. Word has length 53 [2020-11-12 09:21:13,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:13,868 INFO L481 AbstractCegarLoop]: Abstraction has 2130 states and 2641 transitions. [2020-11-12 09:21:13,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:13,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2130 states and 2641 transitions. [2020-11-12 09:21:13,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 09:21:13,871 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:13,871 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:21:14,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:14,086 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:14,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:14,086 INFO L82 PathProgramCache]: Analyzing trace with hash -186929372, now seen corresponding path program 2 times [2020-11-12 09:21:14,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:14,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430828671] [2020-11-12 09:21:14,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:14,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430828671] [2020-11-12 09:21:14,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087756775] [2020-11-12 09:21:14,232 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 [2020-11-12 09:21:14,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:21:14,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:14,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 09:21:14,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:14,489 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:14,496 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:14,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:14,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 09:21:14,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420082851] [2020-11-12 09:21:14,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 09:21:14,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:14,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 09:21:14,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-11-12 09:21:14,498 INFO L87 Difference]: Start difference. First operand 2130 states and 2641 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:14,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:14,823 INFO L93 Difference]: Finished difference Result 3077 states and 3736 transitions. [2020-11-12 09:21:14,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-12 09:21:14,823 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 09:21:14,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:14,826 INFO L225 Difference]: With dead ends: 3077 [2020-11-12 09:21:14,826 INFO L226 Difference]: Without dead ends: 2919 [2020-11-12 09:21:14,826 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-11-12 09:21:14,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2020-11-12 09:21:14,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2130. [2020-11-12 09:21:14,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2130 states, 2018 states have (on average 1.308721506442022) internal successors, (2641), 2129 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:14,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2130 states to 2130 states and 2641 transitions. [2020-11-12 09:21:14,863 INFO L78 Accepts]: Start accepts. Automaton has 2130 states and 2641 transitions. Word has length 53 [2020-11-12 09:21:14,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:14,863 INFO L481 AbstractCegarLoop]: Abstraction has 2130 states and 2641 transitions. [2020-11-12 09:21:14,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:14,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2130 states and 2641 transitions. [2020-11-12 09:21:14,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 09:21:14,866 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:14,866 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:21:15,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-12 09:21:15,080 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:15,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:15,081 INFO L82 PathProgramCache]: Analyzing trace with hash -475513234, now seen corresponding path program 11 times [2020-11-12 09:21:15,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:15,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69399115] [2020-11-12 09:21:15,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:15,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:15,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69399115] [2020-11-12 09:21:15,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843523706] [2020-11-12 09:21:15,228 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 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 [2020-11-12 09:21:15,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-12 09:21:15,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:15,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 09:21:15,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:15,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:15,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:15,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 09:21:15,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656217037] [2020-11-12 09:21:15,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 09:21:15,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:15,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 09:21:15,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-11-12 09:21:15,505 INFO L87 Difference]: Start difference. First operand 2130 states and 2641 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:15,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:15,868 INFO L93 Difference]: Finished difference Result 3166 states and 3844 transitions. [2020-11-12 09:21:15,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-12 09:21:15,869 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 09:21:15,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:15,874 INFO L225 Difference]: With dead ends: 3166 [2020-11-12 09:21:15,874 INFO L226 Difference]: Without dead ends: 3008 [2020-11-12 09:21:15,876 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:21:15,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2020-11-12 09:21:15,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 2131. [2020-11-12 09:21:15,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2131 states, 2019 states have (on average 1.3090638930163447) internal successors, (2643), 2130 states have internal predecessors, (2643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:15,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 2643 transitions. [2020-11-12 09:21:15,918 INFO L78 Accepts]: Start accepts. Automaton has 2131 states and 2643 transitions. Word has length 53 [2020-11-12 09:21:15,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:15,918 INFO L481 AbstractCegarLoop]: Abstraction has 2131 states and 2643 transitions. [2020-11-12 09:21:15,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:15,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2131 states and 2643 transitions. [2020-11-12 09:21:15,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 09:21:15,921 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:15,922 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:21:16,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-12 09:21:16,135 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:16,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:16,137 INFO L82 PathProgramCache]: Analyzing trace with hash -318040390, now seen corresponding path program 3 times [2020-11-12 09:21:16,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:16,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423611054] [2020-11-12 09:21:16,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:16,321 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:16,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423611054] [2020-11-12 09:21:16,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881410604] [2020-11-12 09:21:16,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 09:21:16,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 09:21:16,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:16,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 09:21:16,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:16,553 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:21:16,570 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:16,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:16,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 09:21:16,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046113690] [2020-11-12 09:21:16,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 09:21:16,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:16,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 09:21:16,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-11-12 09:21:16,578 INFO L87 Difference]: Start difference. First operand 2131 states and 2643 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:17,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:17,767 INFO L93 Difference]: Finished difference Result 4358 states and 5181 transitions. [2020-11-12 09:21:17,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-12 09:21:17,767 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 09:21:17,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:17,771 INFO L225 Difference]: With dead ends: 4358 [2020-11-12 09:21:17,771 INFO L226 Difference]: Without dead ends: 3698 [2020-11-12 09:21:17,772 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=607, Invalid=1843, Unknown=0, NotChecked=0, Total=2450 [2020-11-12 09:21:17,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3698 states. [2020-11-12 09:21:17,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3698 to 2146. [2020-11-12 09:21:17,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2146 states, 2034 states have (on average 1.3102261553588987) internal successors, (2665), 2145 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:17,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2146 states to 2146 states and 2665 transitions. [2020-11-12 09:21:17,811 INFO L78 Accepts]: Start accepts. Automaton has 2146 states and 2665 transitions. Word has length 53 [2020-11-12 09:21:17,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:17,811 INFO L481 AbstractCegarLoop]: Abstraction has 2146 states and 2665 transitions. [2020-11-12 09:21:17,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:17,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2146 states and 2665 transitions. [2020-11-12 09:21:17,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 09:21:17,814 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:17,814 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:21:18,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-12 09:21:18,029 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:18,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:18,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1697897262, now seen corresponding path program 12 times [2020-11-12 09:21:18,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:18,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488144815] [2020-11-12 09:21:18,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:18,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488144815] [2020-11-12 09:21:18,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392025906] [2020-11-12 09:21:18,223 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 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 [2020-11-12 09:21:18,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-12 09:21:18,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:18,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 09:21:18,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:18,522 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:18,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:18,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 09:21:18,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395682779] [2020-11-12 09:21:18,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 09:21:18,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:18,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 09:21:18,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-11-12 09:21:18,551 INFO L87 Difference]: Start difference. First operand 2146 states and 2665 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:19,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:19,113 INFO L93 Difference]: Finished difference Result 3352 states and 4081 transitions. [2020-11-12 09:21:19,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-12 09:21:19,114 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 09:21:19,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:19,118 INFO L225 Difference]: With dead ends: 3352 [2020-11-12 09:21:19,118 INFO L226 Difference]: Without dead ends: 3194 [2020-11-12 09:21:19,119 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2020-11-12 09:21:19,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3194 states. [2020-11-12 09:21:19,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 2142. [2020-11-12 09:21:19,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2030 states have (on average 1.3103448275862069) internal successors, (2660), 2141 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:19,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 2660 transitions. [2020-11-12 09:21:19,160 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 2660 transitions. Word has length 53 [2020-11-12 09:21:19,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:19,160 INFO L481 AbstractCegarLoop]: Abstraction has 2142 states and 2660 transitions. [2020-11-12 09:21:19,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:19,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 2660 transitions. [2020-11-12 09:21:19,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 09:21:19,163 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:19,163 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:21:19,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-12 09:21:19,378 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:19,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:19,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1109755004, now seen corresponding path program 13 times [2020-11-12 09:21:19,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:19,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271042166] [2020-11-12 09:21:19,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:19,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:19,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271042166] [2020-11-12 09:21:19,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850681446] [2020-11-12 09:21:19,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 09:21:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:19,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 09:21:19,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:19,757 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:21:19,777 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:19,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:19,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:19,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-12 09:21:19,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704414744] [2020-11-12 09:21:19,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 09:21:19,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:19,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 09:21:19,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-11-12 09:21:19,787 INFO L87 Difference]: Start difference. First operand 2142 states and 2660 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:21,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:21,139 INFO L93 Difference]: Finished difference Result 5092 states and 6167 transitions. [2020-11-12 09:21:21,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-12 09:21:21,140 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 09:21:21,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:21,143 INFO L225 Difference]: With dead ends: 5092 [2020-11-12 09:21:21,144 INFO L226 Difference]: Without dead ends: 4098 [2020-11-12 09:21:21,145 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=664, Invalid=2306, Unknown=0, NotChecked=0, Total=2970 [2020-11-12 09:21:21,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4098 states. [2020-11-12 09:21:21,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4098 to 2145. [2020-11-12 09:21:21,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2145 states, 2033 states have (on average 1.309886866699459) internal successors, (2663), 2144 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:21,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 2663 transitions. [2020-11-12 09:21:21,182 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 2663 transitions. Word has length 53 [2020-11-12 09:21:21,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:21,182 INFO L481 AbstractCegarLoop]: Abstraction has 2145 states and 2663 transitions. [2020-11-12 09:21:21,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:21,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 2663 transitions. [2020-11-12 09:21:21,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:21,185 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:21,186 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:21:21,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-12 09:21:21,402 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:21,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:21,402 INFO L82 PathProgramCache]: Analyzing trace with hash 280002180, now seen corresponding path program 3 times [2020-11-12 09:21:21,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:21,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149343264] [2020-11-12 09:21:21,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:21,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149343264] [2020-11-12 09:21:21,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412965826] [2020-11-12 09:21:21,646 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 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 [2020-11-12 09:21:21,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-12 09:21:21,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:21,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:21,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:21,949 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:21,983 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:21,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:21,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:21,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433774905] [2020-11-12 09:21:21,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:21,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:21,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:21,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:21,997 INFO L87 Difference]: Start difference. First operand 2145 states and 2663 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:22,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:22,460 INFO L93 Difference]: Finished difference Result 3559 states and 4316 transitions. [2020-11-12 09:21:22,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-12 09:21:22,460 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 09:21:22,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:22,463 INFO L225 Difference]: With dead ends: 3559 [2020-11-12 09:21:22,463 INFO L226 Difference]: Without dead ends: 2899 [2020-11-12 09:21:22,463 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2020-11-12 09:21:22,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2020-11-12 09:21:22,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 2155. [2020-11-12 09:21:22,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2043 states have (on average 1.3142437591776799) internal successors, (2685), 2154 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:22,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 2685 transitions. [2020-11-12 09:21:22,487 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 2685 transitions. Word has length 58 [2020-11-12 09:21:22,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:22,488 INFO L481 AbstractCegarLoop]: Abstraction has 2155 states and 2685 transitions. [2020-11-12 09:21:22,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:22,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 2685 transitions. [2020-11-12 09:21:22,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:22,489 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:22,490 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:21:22,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:22,704 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:22,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:22,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1577441719, now seen corresponding path program 4 times [2020-11-12 09:21:22,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:22,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578364906] [2020-11-12 09:21:22,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:22,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:22,881 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:22,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578364906] [2020-11-12 09:21:22,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313407781] [2020-11-12 09:21:22,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 09:21:22,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:21:22,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:22,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:21:22,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:23,190 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:21:23,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:23,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:23,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:23,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523977355] [2020-11-12 09:21:23,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:23,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:23,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:23,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:23,279 INFO L87 Difference]: Start difference. First operand 2155 states and 2685 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:24,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:24,268 INFO L93 Difference]: Finished difference Result 4873 states and 6112 transitions. [2020-11-12 09:21:24,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-12 09:21:24,268 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 09:21:24,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:24,272 INFO L225 Difference]: With dead ends: 4873 [2020-11-12 09:21:24,272 INFO L226 Difference]: Without dead ends: 3816 [2020-11-12 09:21:24,273 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=392, Invalid=1500, Unknown=0, NotChecked=0, Total=1892 [2020-11-12 09:21:24,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2020-11-12 09:21:24,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 2160. [2020-11-12 09:21:24,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2160 states, 2048 states have (on average 1.3134765625) internal successors, (2690), 2159 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:24,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 2690 transitions. [2020-11-12 09:21:24,312 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 2690 transitions. Word has length 58 [2020-11-12 09:21:24,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:24,313 INFO L481 AbstractCegarLoop]: Abstraction has 2160 states and 2690 transitions. [2020-11-12 09:21:24,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:24,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 2690 transitions. [2020-11-12 09:21:24,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:24,315 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:24,315 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 09:21:24,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-12 09:21:24,530 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:24,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:24,530 INFO L82 PathProgramCache]: Analyzing trace with hash 2124442581, now seen corresponding path program 14 times [2020-11-12 09:21:24,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:24,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875563894] [2020-11-12 09:21:24,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:24,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875563894] [2020-11-12 09:21:24,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868911855] [2020-11-12 09:21:24,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:24,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:21:24,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:24,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:24,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:25,140 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:25,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:25,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:25,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178137238] [2020-11-12 09:21:25,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:25,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:25,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:25,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:25,160 INFO L87 Difference]: Start difference. First operand 2160 states and 2690 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:26,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:26,526 INFO L93 Difference]: Finished difference Result 3430 states and 4172 transitions. [2020-11-12 09:21:26,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-12 09:21:26,527 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 09:21:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:26,531 INFO L225 Difference]: With dead ends: 3430 [2020-11-12 09:21:26,531 INFO L226 Difference]: Without dead ends: 3272 [2020-11-12 09:21:26,532 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=276, Invalid=984, Unknown=0, NotChecked=0, Total=1260 [2020-11-12 09:21:26,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2020-11-12 09:21:26,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2162. [2020-11-12 09:21:26,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2162 states, 2050 states have (on average 1.3141463414634147) internal successors, (2694), 2161 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:26,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 2694 transitions. [2020-11-12 09:21:26,569 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 2694 transitions. Word has length 58 [2020-11-12 09:21:26,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:26,569 INFO L481 AbstractCegarLoop]: Abstraction has 2162 states and 2694 transitions. [2020-11-12 09:21:26,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:26,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 2694 transitions. [2020-11-12 09:21:26,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:26,572 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:26,572 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 09:21:26,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-12 09:21:26,786 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:26,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:26,786 INFO L82 PathProgramCache]: Analyzing trace with hash -683209685, now seen corresponding path program 15 times [2020-11-12 09:21:26,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:26,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710321226] [2020-11-12 09:21:26,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:26,982 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:26,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710321226] [2020-11-12 09:21:26,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175596265] [2020-11-12 09:21:26,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:27,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 09:21:27,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:27,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:27,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:27,337 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:21:27,425 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:27,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:27,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:27,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380953316] [2020-11-12 09:21:27,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:27,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:27,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:27,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:27,467 INFO L87 Difference]: Start difference. First operand 2162 states and 2694 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:29,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:29,423 INFO L93 Difference]: Finished difference Result 5004 states and 6078 transitions. [2020-11-12 09:21:29,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-12 09:21:29,424 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 09:21:29,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:29,428 INFO L225 Difference]: With dead ends: 5004 [2020-11-12 09:21:29,428 INFO L226 Difference]: Without dead ends: 4010 [2020-11-12 09:21:29,430 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=704, Invalid=2602, Unknown=0, NotChecked=0, Total=3306 [2020-11-12 09:21:29,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4010 states. [2020-11-12 09:21:29,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4010 to 2160. [2020-11-12 09:21:29,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2160 states, 2048 states have (on average 1.3134765625) internal successors, (2690), 2159 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:29,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 2690 transitions. [2020-11-12 09:21:29,463 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 2690 transitions. Word has length 58 [2020-11-12 09:21:29,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:29,463 INFO L481 AbstractCegarLoop]: Abstraction has 2160 states and 2690 transitions. [2020-11-12 09:21:29,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:29,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 2690 transitions. [2020-11-12 09:21:29,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:29,465 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:29,465 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:21:29,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:29,679 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:29,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:29,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1174241049, now seen corresponding path program 16 times [2020-11-12 09:21:29,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:29,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379999503] [2020-11-12 09:21:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:29,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379999503] [2020-11-12 09:21:29,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735794146] [2020-11-12 09:21:29,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:29,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:21:29,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:29,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:21:29,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:30,224 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:30,279 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:30,283 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:30,286 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:30,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:30,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:30,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686386242] [2020-11-12 09:21:30,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:30,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:30,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:30,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:30,343 INFO L87 Difference]: Start difference. First operand 2160 states and 2690 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:32,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:32,853 INFO L93 Difference]: Finished difference Result 5237 states and 6328 transitions. [2020-11-12 09:21:32,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-12 09:21:32,854 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 09:21:32,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:32,857 INFO L225 Difference]: With dead ends: 5237 [2020-11-12 09:21:32,857 INFO L226 Difference]: Without dead ends: 4243 [2020-11-12 09:21:32,859 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=961, Invalid=3461, Unknown=0, NotChecked=0, Total=4422 [2020-11-12 09:21:32,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4243 states. [2020-11-12 09:21:32,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4243 to 2172. [2020-11-12 09:21:32,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2172 states, 2060 states have (on average 1.3145631067961165) internal successors, (2708), 2171 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:32,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2172 states to 2172 states and 2708 transitions. [2020-11-12 09:21:32,899 INFO L78 Accepts]: Start accepts. Automaton has 2172 states and 2708 transitions. Word has length 58 [2020-11-12 09:21:32,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:32,900 INFO L481 AbstractCegarLoop]: Abstraction has 2172 states and 2708 transitions. [2020-11-12 09:21:32,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:32,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2172 states and 2708 transitions. [2020-11-12 09:21:32,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:32,902 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:32,902 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 09:21:33,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:33,118 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:33,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:33,119 INFO L82 PathProgramCache]: Analyzing trace with hash -188155587, now seen corresponding path program 17 times [2020-11-12 09:21:33,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:33,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056008474] [2020-11-12 09:21:33,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:33,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056008474] [2020-11-12 09:21:33,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839497606] [2020-11-12 09:21:33,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:33,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 09:21:33,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:33,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:33,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:33,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:33,657 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:33,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:33,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:33,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:33,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469097069] [2020-11-12 09:21:33,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:33,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:33,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:33,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:33,714 INFO L87 Difference]: Start difference. First operand 2172 states and 2708 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:34,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:34,536 INFO L93 Difference]: Finished difference Result 3220 states and 3958 transitions. [2020-11-12 09:21:34,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-12 09:21:34,537 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 09:21:34,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:34,540 INFO L225 Difference]: With dead ends: 3220 [2020-11-12 09:21:34,540 INFO L226 Difference]: Without dead ends: 3062 [2020-11-12 09:21:34,541 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=288, Invalid=1044, Unknown=0, NotChecked=0, Total=1332 [2020-11-12 09:21:34,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2020-11-12 09:21:34,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 2177. [2020-11-12 09:21:34,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2065 states have (on average 1.3167070217917676) internal successors, (2719), 2176 states have internal predecessors, (2719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:34,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 2719 transitions. [2020-11-12 09:21:34,566 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 2719 transitions. Word has length 58 [2020-11-12 09:21:34,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:34,566 INFO L481 AbstractCegarLoop]: Abstraction has 2177 states and 2719 transitions. [2020-11-12 09:21:34,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:34,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 2719 transitions. [2020-11-12 09:21:34,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:34,568 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:34,568 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 09:21:34,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-11-12 09:21:34,769 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:34,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:34,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1729143877, now seen corresponding path program 18 times [2020-11-12 09:21:34,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:34,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250042621] [2020-11-12 09:21:34,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:34,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250042621] [2020-11-12 09:21:34,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050090981] [2020-11-12 09:21:34,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:35,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-12 09:21:35,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:35,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:35,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:35,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:35,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:35,346 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:35,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:35,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:35,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746837475] [2020-11-12 09:21:35,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:35,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:35,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:35,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:35,400 INFO L87 Difference]: Start difference. First operand 2177 states and 2719 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:36,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:36,502 INFO L93 Difference]: Finished difference Result 3303 states and 4033 transitions. [2020-11-12 09:21:36,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-12 09:21:36,503 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 09:21:36,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:36,506 INFO L225 Difference]: With dead ends: 3303 [2020-11-12 09:21:36,507 INFO L226 Difference]: Without dead ends: 3145 [2020-11-12 09:21:36,507 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=395, Invalid=1327, Unknown=0, NotChecked=0, Total=1722 [2020-11-12 09:21:36,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3145 states. [2020-11-12 09:21:36,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3145 to 2182. [2020-11-12 09:21:36,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2070 states have (on average 1.318840579710145) internal successors, (2730), 2181 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:36,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 2730 transitions. [2020-11-12 09:21:36,535 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 2730 transitions. Word has length 58 [2020-11-12 09:21:36,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:36,535 INFO L481 AbstractCegarLoop]: Abstraction has 2182 states and 2730 transitions. [2020-11-12 09:21:36,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:36,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 2730 transitions. [2020-11-12 09:21:36,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:36,537 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:36,537 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 09:21:36,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:36,738 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:36,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:36,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1078508389, now seen corresponding path program 19 times [2020-11-12 09:21:36,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:36,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720852933] [2020-11-12 09:21:36,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:36,959 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:36,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720852933] [2020-11-12 09:21:36,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194728171] [2020-11-12 09:21:36,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:37,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:37,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:37,283 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:21:37,290 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:21:37,301 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:21:37,429 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:37,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:37,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:37,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187571668] [2020-11-12 09:21:37,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:37,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:37,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:37,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:37,480 INFO L87 Difference]: Start difference. First operand 2182 states and 2730 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:39,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:39,821 INFO L93 Difference]: Finished difference Result 5045 states and 6154 transitions. [2020-11-12 09:21:39,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-12 09:21:39,822 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 09:21:39,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:39,826 INFO L225 Difference]: With dead ends: 5045 [2020-11-12 09:21:39,826 INFO L226 Difference]: Without dead ends: 4051 [2020-11-12 09:21:39,828 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=814, Invalid=2968, Unknown=0, NotChecked=0, Total=3782 [2020-11-12 09:21:39,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2020-11-12 09:21:39,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 2150. [2020-11-12 09:21:39,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 2038 states have (on average 1.310107948969578) internal successors, (2670), 2149 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:39,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 2670 transitions. [2020-11-12 09:21:39,860 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 2670 transitions. Word has length 58 [2020-11-12 09:21:39,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:39,860 INFO L481 AbstractCegarLoop]: Abstraction has 2150 states and 2670 transitions. [2020-11-12 09:21:39,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:39,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 2670 transitions. [2020-11-12 09:21:39,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:39,862 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:39,862 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 09:21:40,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-12 09:21:40,063 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:40,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:40,064 INFO L82 PathProgramCache]: Analyzing trace with hash 443924589, now seen corresponding path program 20 times [2020-11-12 09:21:40,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:40,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978335501] [2020-11-12 09:21:40,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:40,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:40,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978335501] [2020-11-12 09:21:40,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505672391] [2020-11-12 09:21:40,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:40,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:21:40,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:40,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:40,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:40,546 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:40,582 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:40,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:40,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:40,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493677944] [2020-11-12 09:21:40,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:40,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:40,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:40,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:40,617 INFO L87 Difference]: Start difference. First operand 2150 states and 2670 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:43,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:43,279 INFO L93 Difference]: Finished difference Result 6087 states and 7353 transitions. [2020-11-12 09:21:43,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-12 09:21:43,279 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 09:21:43,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:43,284 INFO L225 Difference]: With dead ends: 6087 [2020-11-12 09:21:43,284 INFO L226 Difference]: Without dead ends: 4511 [2020-11-12 09:21:43,285 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1746 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1140, Invalid=4262, Unknown=0, NotChecked=0, Total=5402 [2020-11-12 09:21:43,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2020-11-12 09:21:43,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 2331. [2020-11-12 09:21:43,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2219 states have (on average 1.2902208201892744) internal successors, (2863), 2330 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:43,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 2863 transitions. [2020-11-12 09:21:43,315 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 2863 transitions. Word has length 58 [2020-11-12 09:21:43,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:43,315 INFO L481 AbstractCegarLoop]: Abstraction has 2331 states and 2863 transitions. [2020-11-12 09:21:43,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:43,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 2863 transitions. [2020-11-12 09:21:43,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:43,317 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:43,317 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 09:21:43,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:43,518 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:43,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:43,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1662471653, now seen corresponding path program 21 times [2020-11-12 09:21:43,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:43,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792461388] [2020-11-12 09:21:43,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:43,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:43,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792461388] [2020-11-12 09:21:43,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067495118] [2020-11-12 09:21:43,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:43,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 09:21:43,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:43,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:43,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:44,068 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:44,077 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:44,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:44,127 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:44,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:44,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:44,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677283932] [2020-11-12 09:21:44,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:44,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:44,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:44,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:44,129 INFO L87 Difference]: Start difference. First operand 2331 states and 2863 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:45,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:45,360 INFO L93 Difference]: Finished difference Result 3907 states and 4698 transitions. [2020-11-12 09:21:45,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-12 09:21:45,365 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 09:21:45,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:45,369 INFO L225 Difference]: With dead ends: 3907 [2020-11-12 09:21:45,370 INFO L226 Difference]: Without dead ends: 3749 [2020-11-12 09:21:45,370 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=466, Invalid=1604, Unknown=0, NotChecked=0, Total=2070 [2020-11-12 09:21:45,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3749 states. [2020-11-12 09:21:45,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3749 to 2361. [2020-11-12 09:21:45,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2249 states have (on average 1.297910182303246) internal successors, (2919), 2360 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:45,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 2919 transitions. [2020-11-12 09:21:45,400 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 2919 transitions. Word has length 58 [2020-11-12 09:21:45,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:45,400 INFO L481 AbstractCegarLoop]: Abstraction has 2361 states and 2919 transitions. [2020-11-12 09:21:45,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:45,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 2919 transitions. [2020-11-12 09:21:45,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:45,403 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:45,403 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 09:21:45,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-12 09:21:45,604 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:45,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:45,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1976176429, now seen corresponding path program 22 times [2020-11-12 09:21:45,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:45,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446605766] [2020-11-12 09:21:45,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:45,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446605766] [2020-11-12 09:21:45,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584323329] [2020-11-12 09:21:45,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:45,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:21:45,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:45,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:21:45,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:46,131 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:21:46,195 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:46,197 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:46,199 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:46,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:46,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:46,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829642755] [2020-11-12 09:21:46,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:46,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:46,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:46,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:46,253 INFO L87 Difference]: Start difference. First operand 2361 states and 2919 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:49,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:49,360 INFO L93 Difference]: Finished difference Result 6070 states and 7388 transitions. [2020-11-12 09:21:49,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-11-12 09:21:49,361 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 09:21:49,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:49,366 INFO L225 Difference]: With dead ends: 6070 [2020-11-12 09:21:49,366 INFO L226 Difference]: Without dead ends: 5030 [2020-11-12 09:21:49,367 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1982 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2020-11-12 09:21:49,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5030 states. [2020-11-12 09:21:49,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5030 to 2379. [2020-11-12 09:21:49,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2379 states, 2267 states have (on average 1.301720335244817) internal successors, (2951), 2378 states have internal predecessors, (2951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:49,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 2951 transitions. [2020-11-12 09:21:49,405 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 2951 transitions. Word has length 58 [2020-11-12 09:21:49,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:49,405 INFO L481 AbstractCegarLoop]: Abstraction has 2379 states and 2951 transitions. [2020-11-12 09:21:49,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:49,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 2951 transitions. [2020-11-12 09:21:49,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:49,407 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:49,407 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:21:49,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-12 09:21:49,613 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:49,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:49,614 INFO L82 PathProgramCache]: Analyzing trace with hash -740359841, now seen corresponding path program 23 times [2020-11-12 09:21:49,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:49,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67079472] [2020-11-12 09:21:49,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:49,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67079472] [2020-11-12 09:21:49,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325157539] [2020-11-12 09:21:49,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:49,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 09:21:49,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:49,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:49,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:50,146 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:50,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:50,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:50,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005218738] [2020-11-12 09:21:50,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:50,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:50,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:50,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:50,184 INFO L87 Difference]: Start difference. First operand 2379 states and 2951 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:50,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:50,994 INFO L93 Difference]: Finished difference Result 3900 states and 4709 transitions. [2020-11-12 09:21:50,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-12 09:21:50,995 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 09:21:50,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:50,998 INFO L225 Difference]: With dead ends: 3900 [2020-11-12 09:21:50,999 INFO L226 Difference]: Without dead ends: 3742 [2020-11-12 09:21:50,999 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=304, Invalid=1028, Unknown=0, NotChecked=0, Total=1332 [2020-11-12 09:21:51,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3742 states. [2020-11-12 09:21:51,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3742 to 2400. [2020-11-12 09:21:51,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2288 states have (on average 1.3068181818181819) internal successors, (2990), 2399 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:51,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 2990 transitions. [2020-11-12 09:21:51,032 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 2990 transitions. Word has length 58 [2020-11-12 09:21:51,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:51,032 INFO L481 AbstractCegarLoop]: Abstraction has 2400 states and 2990 transitions. [2020-11-12 09:21:51,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:51,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 2990 transitions. [2020-11-12 09:21:51,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:51,034 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:51,034 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:21:51,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-12 09:21:51,235 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:51,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:51,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1433050655, now seen corresponding path program 24 times [2020-11-12 09:21:51,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:51,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256771831] [2020-11-12 09:21:51,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:51,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256771831] [2020-11-12 09:21:51,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898015777] [2020-11-12 09:21:51,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:51,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 09:21:51,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:51,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:51,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:51,777 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:51,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:51,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:51,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522336997] [2020-11-12 09:21:51,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:51,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:51,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:51,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:51,816 INFO L87 Difference]: Start difference. First operand 2400 states and 2990 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:53,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:53,234 INFO L93 Difference]: Finished difference Result 4148 states and 5049 transitions. [2020-11-12 09:21:53,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-12 09:21:53,235 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 09:21:53,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:53,239 INFO L225 Difference]: With dead ends: 4148 [2020-11-12 09:21:53,239 INFO L226 Difference]: Without dead ends: 3990 [2020-11-12 09:21:53,239 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=597, Invalid=1953, Unknown=0, NotChecked=0, Total=2550 [2020-11-12 09:21:53,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3990 states. [2020-11-12 09:21:53,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3990 to 2417. [2020-11-12 09:21:53,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2305 states have (on average 1.3106290672451193) internal successors, (3021), 2416 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:53,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 3021 transitions. [2020-11-12 09:21:53,267 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 3021 transitions. Word has length 58 [2020-11-12 09:21:53,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:53,267 INFO L481 AbstractCegarLoop]: Abstraction has 2417 states and 3021 transitions. [2020-11-12 09:21:53,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:53,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 3021 transitions. [2020-11-12 09:21:53,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:53,269 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:53,269 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:21:53,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-12 09:21:53,470 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:53,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:53,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1374601611, now seen corresponding path program 25 times [2020-11-12 09:21:53,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:53,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245513656] [2020-11-12 09:21:53,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:53,698 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:53,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245513656] [2020-11-12 09:21:53,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847860655] [2020-11-12 09:21:53,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:21:53,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:53,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:53,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:53,992 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:21:54,019 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:54,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:54,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:54,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101674096] [2020-11-12 09:21:54,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:54,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:54,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:54,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:54,032 INFO L87 Difference]: Start difference. First operand 2417 states and 3021 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:56,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:56,468 INFO L93 Difference]: Finished difference Result 6182 states and 7459 transitions. [2020-11-12 09:21:56,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-11-12 09:21:56,473 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 09:21:56,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:56,478 INFO L225 Difference]: With dead ends: 6182 [2020-11-12 09:21:56,479 INFO L226 Difference]: Without dead ends: 5188 [2020-11-12 09:21:56,479 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1809 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1187, Invalid=4215, Unknown=0, NotChecked=0, Total=5402 [2020-11-12 09:21:56,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5188 states. [2020-11-12 09:21:56,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5188 to 2436. [2020-11-12 09:21:56,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2436 states, 2324 states have (on average 1.3154044750430292) internal successors, (3057), 2435 states have internal predecessors, (3057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:56,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 3057 transitions. [2020-11-12 09:21:56,519 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 3057 transitions. Word has length 58 [2020-11-12 09:21:56,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:56,519 INFO L481 AbstractCegarLoop]: Abstraction has 2436 states and 3057 transitions. [2020-11-12 09:21:56,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:56,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 3057 transitions. [2020-11-12 09:21:56,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:56,521 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:56,522 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:21:56,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-12 09:21:56,727 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:56,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:56,728 INFO L82 PathProgramCache]: Analyzing trace with hash 2109468703, now seen corresponding path program 4 times [2020-11-12 09:21:56,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:56,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070580380] [2020-11-12 09:21:56,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:56,919 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:56,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070580380] [2020-11-12 09:21:56,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703124576] [2020-11-12 09:21:56,920 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 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 [2020-11-12 09:21:56,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:21:56,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:56,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:56,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:57,263 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:57,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:57,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:57,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176986774] [2020-11-12 09:21:57,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:57,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:57,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:57,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:57,302 INFO L87 Difference]: Start difference. First operand 2436 states and 3057 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:57,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:57,792 INFO L93 Difference]: Finished difference Result 3667 states and 4469 transitions. [2020-11-12 09:21:57,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-12 09:21:57,793 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 09:21:57,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:57,797 INFO L225 Difference]: With dead ends: 3667 [2020-11-12 09:21:57,797 INFO L226 Difference]: Without dead ends: 3509 [2020-11-12 09:21:57,797 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2020-11-12 09:21:57,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2020-11-12 09:21:57,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 2440. [2020-11-12 09:21:57,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2328 states have (on average 1.3148625429553265) internal successors, (3061), 2439 states have internal predecessors, (3061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:57,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 3061 transitions. [2020-11-12 09:21:57,825 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 3061 transitions. Word has length 58 [2020-11-12 09:21:57,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:57,826 INFO L481 AbstractCegarLoop]: Abstraction has 2440 states and 3061 transitions. [2020-11-12 09:21:57,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:57,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 3061 transitions. [2020-11-12 09:21:57,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:57,828 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:57,828 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 09:21:58,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-11-12 09:21:58,029 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:58,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:58,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1016552829, now seen corresponding path program 26 times [2020-11-12 09:21:58,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:58,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194166988] [2020-11-12 09:21:58,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:58,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194166988] [2020-11-12 09:21:58,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799346468] [2020-11-12 09:21:58,212 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 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 [2020-11-12 09:21:58,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:21:58,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:58,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:58,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:58,551 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:58,553 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:58,566 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:21:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:58,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:21:58,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:21:58,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940868510] [2020-11-12 09:21:58,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:21:58,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:21:58,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:21:58,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:21:58,633 INFO L87 Difference]: Start difference. First operand 2440 states and 3061 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:59,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:21:59,178 INFO L93 Difference]: Finished difference Result 3752 states and 4564 transitions. [2020-11-12 09:21:59,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-12 09:21:59,179 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 09:21:59,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:21:59,182 INFO L225 Difference]: With dead ends: 3752 [2020-11-12 09:21:59,183 INFO L226 Difference]: Without dead ends: 3594 [2020-11-12 09:21:59,183 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2020-11-12 09:21:59,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3594 states. [2020-11-12 09:21:59,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3594 to 2445. [2020-11-12 09:21:59,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2445 states, 2333 states have (on average 1.3167595370767253) internal successors, (3072), 2444 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:59,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2445 states to 2445 states and 3072 transitions. [2020-11-12 09:21:59,227 INFO L78 Accepts]: Start accepts. Automaton has 2445 states and 3072 transitions. Word has length 58 [2020-11-12 09:21:59,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:21:59,227 INFO L481 AbstractCegarLoop]: Abstraction has 2445 states and 3072 transitions. [2020-11-12 09:21:59,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:21:59,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2445 states and 3072 transitions. [2020-11-12 09:21:59,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:21:59,230 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:21:59,230 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 09:21:59,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-12 09:21:59,431 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:21:59,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:21:59,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1142065091, now seen corresponding path program 27 times [2020-11-12 09:21:59,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:21:59,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268659240] [2020-11-12 09:21:59,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:21:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:21:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:21:59,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268659240] [2020-11-12 09:21:59,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002453590] [2020-11-12 09:21:59,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 09:21:59,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 09:21:59,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:21:59,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:21:59,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:21:59,963 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:00,000 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:22:00,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:00,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:22:00,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843829000] [2020-11-12 09:22:00,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:22:00,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:00,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:22:00,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:22:00,001 INFO L87 Difference]: Start difference. First operand 2445 states and 3072 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:00,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:00,368 INFO L93 Difference]: Finished difference Result 3405 states and 4209 transitions. [2020-11-12 09:22:00,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-12 09:22:00,369 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 09:22:00,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:00,373 INFO L225 Difference]: With dead ends: 3405 [2020-11-12 09:22:00,373 INFO L226 Difference]: Without dead ends: 3247 [2020-11-12 09:22:00,373 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2020-11-12 09:22:00,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2020-11-12 09:22:00,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 2445. [2020-11-12 09:22:00,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2445 states, 2333 states have (on average 1.3167595370767253) internal successors, (3072), 2444 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:00,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2445 states to 2445 states and 3072 transitions. [2020-11-12 09:22:00,401 INFO L78 Accepts]: Start accepts. Automaton has 2445 states and 3072 transitions. Word has length 58 [2020-11-12 09:22:00,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:00,402 INFO L481 AbstractCegarLoop]: Abstraction has 2445 states and 3072 transitions. [2020-11-12 09:22:00,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:00,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2445 states and 3072 transitions. [2020-11-12 09:22:00,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:22:00,405 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:00,405 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:22:00,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:22:00,607 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:00,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:00,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1736471079, now seen corresponding path program 5 times [2020-11-12 09:22:00,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:00,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467825982] [2020-11-12 09:22:00,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:00,833 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:22:00,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467825982] [2020-11-12 09:22:00,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404693621] [2020-11-12 09:22:00,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:22:00,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-12 09:22:00,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:22:00,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:22:00,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:01,121 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:22:01,154 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:22:01,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:01,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:22:01,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571618092] [2020-11-12 09:22:01,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:22:01,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:01,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:22:01,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:22:01,193 INFO L87 Difference]: Start difference. First operand 2445 states and 3072 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:03,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:03,147 INFO L93 Difference]: Finished difference Result 5644 states and 6893 transitions. [2020-11-12 09:22:03,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-12 09:22:03,148 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 09:22:03,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:03,153 INFO L225 Difference]: With dead ends: 5644 [2020-11-12 09:22:03,154 INFO L226 Difference]: Without dead ends: 4650 [2020-11-12 09:22:03,154 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=927, Invalid=3105, Unknown=0, NotChecked=0, Total=4032 [2020-11-12 09:22:03,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4650 states. [2020-11-12 09:22:03,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4650 to 2447. [2020-11-12 09:22:03,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 2335 states have (on average 1.3160599571734475) internal successors, (3073), 2446 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:03,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 3073 transitions. [2020-11-12 09:22:03,187 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 3073 transitions. Word has length 58 [2020-11-12 09:22:03,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:03,187 INFO L481 AbstractCegarLoop]: Abstraction has 2447 states and 3073 transitions. [2020-11-12 09:22:03,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:03,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 3073 transitions. [2020-11-12 09:22:03,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:22:03,189 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:03,189 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:22:03,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-11-12 09:22:03,390 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:03,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:03,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1740828817, now seen corresponding path program 28 times [2020-11-12 09:22:03,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:03,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195618924] [2020-11-12 09:22:03,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:03,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:03,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:22:03,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195618924] [2020-11-12 09:22:03,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182807569] [2020-11-12 09:22:03,612 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 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 [2020-11-12 09:22:03,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:22:03,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:22:03,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:22:03,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:03,911 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:22:03,970 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:22:04,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:04,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:22:04,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965788685] [2020-11-12 09:22:04,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:22:04,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:04,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:22:04,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:22:04,009 INFO L87 Difference]: Start difference. First operand 2447 states and 3073 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:06,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:06,153 INFO L93 Difference]: Finished difference Result 6115 states and 7593 transitions. [2020-11-12 09:22:06,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-12 09:22:06,154 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 09:22:06,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:06,158 INFO L225 Difference]: With dead ends: 6115 [2020-11-12 09:22:06,158 INFO L226 Difference]: Without dead ends: 5075 [2020-11-12 09:22:06,158 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=894, Invalid=3138, Unknown=0, NotChecked=0, Total=4032 [2020-11-12 09:22:06,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5075 states. [2020-11-12 09:22:06,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5075 to 2458. [2020-11-12 09:22:06,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2458 states, 2346 states have (on average 1.3175618073316282) internal successors, (3091), 2457 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:06,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2458 states to 2458 states and 3091 transitions. [2020-11-12 09:22:06,187 INFO L78 Accepts]: Start accepts. Automaton has 2458 states and 3091 transitions. Word has length 58 [2020-11-12 09:22:06,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:06,187 INFO L481 AbstractCegarLoop]: Abstraction has 2458 states and 3091 transitions. [2020-11-12 09:22:06,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:06,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2458 states and 3091 transitions. [2020-11-12 09:22:06,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:22:06,190 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:06,190 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 09:22:06,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:22:06,391 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:06,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:06,391 INFO L82 PathProgramCache]: Analyzing trace with hash 749395589, now seen corresponding path program 29 times [2020-11-12 09:22:06,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:06,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049024788] [2020-11-12 09:22:06,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:06,591 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:22:06,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049024788] [2020-11-12 09:22:06,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484263373] [2020-11-12 09:22:06,592 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 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 [2020-11-12 09:22:06,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-12 09:22:06,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:22:06,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:22:06,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:06,940 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:06,944 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:06,948 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:07,013 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:22:07,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:07,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:22:07,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772341996] [2020-11-12 09:22:07,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:22:07,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:07,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:22:07,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:22:07,014 INFO L87 Difference]: Start difference. First operand 2458 states and 3091 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:07,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:07,732 INFO L93 Difference]: Finished difference Result 3829 states and 4660 transitions. [2020-11-12 09:22:07,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-12 09:22:07,733 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 09:22:07,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:07,736 INFO L225 Difference]: With dead ends: 3829 [2020-11-12 09:22:07,736 INFO L226 Difference]: Without dead ends: 3671 [2020-11-12 09:22:07,737 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=277, Invalid=913, Unknown=0, NotChecked=0, Total=1190 [2020-11-12 09:22:07,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2020-11-12 09:22:07,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 2453. [2020-11-12 09:22:07,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2341 states have (on average 1.3156770610850064) internal successors, (3080), 2452 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:07,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3080 transitions. [2020-11-12 09:22:07,763 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3080 transitions. Word has length 58 [2020-11-12 09:22:07,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:07,763 INFO L481 AbstractCegarLoop]: Abstraction has 2453 states and 3080 transitions. [2020-11-12 09:22:07,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:07,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3080 transitions. [2020-11-12 09:22:07,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 09:22:07,765 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:07,765 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-12 09:22:07,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-11-12 09:22:07,966 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:07,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:07,967 INFO L82 PathProgramCache]: Analyzing trace with hash 618284571, now seen corresponding path program 30 times [2020-11-12 09:22:07,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:07,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695051524] [2020-11-12 09:22:07,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:22:08,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695051524] [2020-11-12 09:22:08,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813635047] [2020-11-12 09:22:08,221 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 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 [2020-11-12 09:22:08,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 09:22:08,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:22:08,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:22:08,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:08,526 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:22:08,589 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:08,591 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:08,592 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:08,653 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:22:08,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:08,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 09:22:08,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7728063] [2020-11-12 09:22:08,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:22:08,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:08,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:22:08,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:22:08,654 INFO L87 Difference]: Start difference. First operand 2453 states and 3080 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:11,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:11,245 INFO L93 Difference]: Finished difference Result 6066 states and 7304 transitions. [2020-11-12 09:22:11,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-11-12 09:22:11,246 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 09:22:11,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:11,251 INFO L225 Difference]: With dead ends: 6066 [2020-11-12 09:22:11,251 INFO L226 Difference]: Without dead ends: 5072 [2020-11-12 09:22:11,252 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1057, Invalid=4055, Unknown=0, NotChecked=0, Total=5112 [2020-11-12 09:22:11,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5072 states. [2020-11-12 09:22:11,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5072 to 2455. [2020-11-12 09:22:11,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2455 states, 2343 states have (on average 1.3162612035851473) internal successors, (3084), 2454 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:11,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2455 states to 2455 states and 3084 transitions. [2020-11-12 09:22:11,287 INFO L78 Accepts]: Start accepts. Automaton has 2455 states and 3084 transitions. Word has length 58 [2020-11-12 09:22:11,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:11,287 INFO L481 AbstractCegarLoop]: Abstraction has 2455 states and 3084 transitions. [2020-11-12 09:22:11,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:11,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2455 states and 3084 transitions. [2020-11-12 09:22:11,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:22:11,289 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:11,289 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:22:11,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:22:11,490 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:11,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:11,491 INFO L82 PathProgramCache]: Analyzing trace with hash -956807834, now seen corresponding path program 5 times [2020-11-12 09:22:11,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:11,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73490597] [2020-11-12 09:22:11,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:11,737 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:22:11,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73490597] [2020-11-12 09:22:11,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012492334] [2020-11-12 09:22:11,737 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 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 [2020-11-12 09:22:11,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-12 09:22:11,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:22:11,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:22:11,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:12,088 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:22:12,147 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:12,185 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:22:12,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:12,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:22:12,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857692603] [2020-11-12 09:22:12,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:22:12,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:12,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:22:12,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:22:12,186 INFO L87 Difference]: Start difference. First operand 2455 states and 3084 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:13,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:13,460 INFO L93 Difference]: Finished difference Result 5662 states and 7068 transitions. [2020-11-12 09:22:13,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-12 09:22:13,462 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 09:22:13,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:13,467 INFO L225 Difference]: With dead ends: 5662 [2020-11-12 09:22:13,467 INFO L226 Difference]: Without dead ends: 4605 [2020-11-12 09:22:13,467 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=469, Invalid=1787, Unknown=0, NotChecked=0, Total=2256 [2020-11-12 09:22:13,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2020-11-12 09:22:13,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 2469. [2020-11-12 09:22:13,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 2357 states have (on average 1.3173525668222317) internal successors, (3105), 2468 states have internal predecessors, (3105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 3105 transitions. [2020-11-12 09:22:13,504 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 3105 transitions. Word has length 63 [2020-11-12 09:22:13,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:13,504 INFO L481 AbstractCegarLoop]: Abstraction has 2469 states and 3105 transitions. [2020-11-12 09:22:13,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:13,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 3105 transitions. [2020-11-12 09:22:13,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:22:13,506 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:13,506 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-11-12 09:22:13,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-12 09:22:13,707 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:13,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:13,710 INFO L82 PathProgramCache]: Analyzing trace with hash 2017216476, now seen corresponding path program 31 times [2020-11-12 09:22:13,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:13,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364573728] [2020-11-12 09:22:13,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:22:13,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364573728] [2020-11-12 09:22:13,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551751081] [2020-11-12 09:22:13,986 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 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 [2020-11-12 09:22:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:14,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:22:14,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:14,354 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:14,404 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:22:14,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:14,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-11-12 09:22:14,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285479887] [2020-11-12 09:22:14,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-12 09:22:14,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:14,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-12 09:22:14,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2020-11-12 09:22:14,416 INFO L87 Difference]: Start difference. First operand 2469 states and 3105 transitions. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:16,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:16,255 INFO L93 Difference]: Finished difference Result 5403 states and 6492 transitions. [2020-11-12 09:22:16,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-12 09:22:16,256 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 09:22:16,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:16,260 INFO L225 Difference]: With dead ends: 5403 [2020-11-12 09:22:16,260 INFO L226 Difference]: Without dead ends: 4743 [2020-11-12 09:22:16,261 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=641, Invalid=2115, Unknown=0, NotChecked=0, Total=2756 [2020-11-12 09:22:16,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4743 states. [2020-11-12 09:22:16,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4743 to 2486. [2020-11-12 09:22:16,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2374 states have (on average 1.3201347935973042) internal successors, (3134), 2485 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:16,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 3134 transitions. [2020-11-12 09:22:16,290 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 3134 transitions. Word has length 63 [2020-11-12 09:22:16,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:16,290 INFO L481 AbstractCegarLoop]: Abstraction has 2486 states and 3134 transitions. [2020-11-12 09:22:16,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:16,290 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 3134 transitions. [2020-11-12 09:22:16,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:22:16,292 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:16,292 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-11-12 09:22:16,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-12 09:22:16,493 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:16,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:16,494 INFO L82 PathProgramCache]: Analyzing trace with hash -409806972, now seen corresponding path program 32 times [2020-11-12 09:22:16,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:16,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819872149] [2020-11-12 09:22:16,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:22:16,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819872149] [2020-11-12 09:22:16,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210725785] [2020-11-12 09:22:16,748 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 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 [2020-11-12 09:22:16,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:22:16,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:22:16,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:22:16,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:17,213 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:17,215 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:17,216 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:22:17,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:17,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:22:17,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446595695] [2020-11-12 09:22:17,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:22:17,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:17,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:22:17,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:22:17,292 INFO L87 Difference]: Start difference. First operand 2486 states and 3134 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:18,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:22:18,353 INFO L93 Difference]: Finished difference Result 4127 states and 5007 transitions. [2020-11-12 09:22:18,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-12 09:22:18,354 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 09:22:18,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:22:18,359 INFO L225 Difference]: With dead ends: 4127 [2020-11-12 09:22:18,359 INFO L226 Difference]: Without dead ends: 3969 [2020-11-12 09:22:18,360 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=339, Invalid=1221, Unknown=0, NotChecked=0, Total=1560 [2020-11-12 09:22:18,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3969 states. [2020-11-12 09:22:18,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3969 to 2486. [2020-11-12 09:22:18,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2374 states have (on average 1.3201347935973042) internal successors, (3134), 2485 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:18,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 3134 transitions. [2020-11-12 09:22:18,402 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 3134 transitions. Word has length 63 [2020-11-12 09:22:18,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:22:18,402 INFO L481 AbstractCegarLoop]: Abstraction has 2486 states and 3134 transitions. [2020-11-12 09:22:18,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:18,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 3134 transitions. [2020-11-12 09:22:18,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:22:18,405 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:22:18,405 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-11-12 09:22:18,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-12 09:22:18,615 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:22:18,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:22:18,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1077508058, now seen corresponding path program 33 times [2020-11-12 09:22:18,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:22:18,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568770291] [2020-11-12 09:22:18,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:22:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:22:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:22:18,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568770291] [2020-11-12 09:22:18,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216578644] [2020-11-12 09:22:18,864 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 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 [2020-11-12 09:22:18,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-12 09:22:18,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:22:18,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:22:18,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:22:19,298 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:22:22,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:22:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:22:22,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:22:22,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:22:22,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628369779] [2020-11-12 09:22:22,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:22:22,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:22:22,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:22:22,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=383, Unknown=2, NotChecked=0, Total=506 [2020-11-12 09:22:22,314 INFO L87 Difference]: Start difference. First operand 2486 states and 3134 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:22:43,323 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-11-12 09:23:37,111 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2020-11-12 09:24:22,793 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-11-12 09:24:41,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:24:41,843 INFO L93 Difference]: Finished difference Result 6010 states and 7140 transitions. [2020-11-12 09:24:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-12 09:24:41,844 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 09:24:41,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:24:41,850 INFO L225 Difference]: With dead ends: 6010 [2020-11-12 09:24:41,850 INFO L226 Difference]: Without dead ends: 5152 [2020-11-12 09:24:41,851 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 52.3s TimeCoverageRelationStatistics Valid=831, Invalid=3180, Unknown=21, NotChecked=0, Total=4032 [2020-11-12 09:24:41,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5152 states. [2020-11-12 09:24:41,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5152 to 2494. [2020-11-12 09:24:41,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 2382 states have (on average 1.3215785054575986) internal successors, (3148), 2493 states have internal predecessors, (3148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:24:41,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 3148 transitions. [2020-11-12 09:24:41,889 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 3148 transitions. Word has length 63 [2020-11-12 09:24:41,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:24:41,889 INFO L481 AbstractCegarLoop]: Abstraction has 2494 states and 3148 transitions. [2020-11-12 09:24:41,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:24:41,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 3148 transitions. [2020-11-12 09:24:41,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:24:41,892 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:24:41,892 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:24:42,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-11-12 09:24:42,093 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:24:42,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:24:42,094 INFO L82 PathProgramCache]: Analyzing trace with hash 586476694, now seen corresponding path program 34 times [2020-11-12 09:24:42,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:24:42,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733202979] [2020-11-12 09:24:42,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:24:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:24:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:24:42,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733202979] [2020-11-12 09:24:42,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735219661] [2020-11-12 09:24:42,466 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 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 [2020-11-12 09:24:42,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:24:42,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:24:42,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:24:42,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:24:43,083 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:43,146 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:24:43,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:24:43,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-11-12 09:24:43,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664082078] [2020-11-12 09:24:43,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-12 09:24:43,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:24:43,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-12 09:24:43,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-11-12 09:24:43,166 INFO L87 Difference]: Start difference. First operand 2494 states and 3148 transitions. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:24:46,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:24:46,302 INFO L93 Difference]: Finished difference Result 5948 states and 7129 transitions. [2020-11-12 09:24:46,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-12 09:24:46,303 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 09:24:46,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:24:46,309 INFO L225 Difference]: With dead ends: 5948 [2020-11-12 09:24:46,309 INFO L226 Difference]: Without dead ends: 5288 [2020-11-12 09:24:46,310 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=927, Invalid=2979, Unknown=0, NotChecked=0, Total=3906 [2020-11-12 09:24:46,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5288 states. [2020-11-12 09:24:46,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5288 to 2514. [2020-11-12 09:24:46,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2514 states, 2402 states have (on average 1.3238967527060783) internal successors, (3180), 2513 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:24:46,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2514 states to 2514 states and 3180 transitions. [2020-11-12 09:24:46,352 INFO L78 Accepts]: Start accepts. Automaton has 2514 states and 3180 transitions. Word has length 63 [2020-11-12 09:24:46,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:24:46,353 INFO L481 AbstractCegarLoop]: Abstraction has 2514 states and 3180 transitions. [2020-11-12 09:24:46,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:24:46,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2514 states and 3180 transitions. [2020-11-12 09:24:46,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:24:46,355 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:24:46,355 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:24:46,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:24:46,556 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:24:46,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:24:46,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1840546754, now seen corresponding path program 35 times [2020-11-12 09:24:46,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:24:46,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243354088] [2020-11-12 09:24:46,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:24:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:24:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:24:46,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243354088] [2020-11-12 09:24:46,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674087610] [2020-11-12 09:24:46,863 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 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 [2020-11-12 09:24:46,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 09:24:46,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:24:46,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:24:46,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:24:47,603 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:47,674 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:24:47,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:24:47,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:24:47,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854676818] [2020-11-12 09:24:47,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:24:47,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:24:47,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:24:47,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:24:47,676 INFO L87 Difference]: Start difference. First operand 2514 states and 3180 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:24:49,540 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 15 [2020-11-12 09:24:50,013 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-11-12 09:24:52,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:24:52,813 INFO L93 Difference]: Finished difference Result 4924 states and 5995 transitions. [2020-11-12 09:24:52,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-12 09:24:52,815 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 09:24:52,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:24:52,821 INFO L225 Difference]: With dead ends: 4924 [2020-11-12 09:24:52,821 INFO L226 Difference]: Without dead ends: 4678 [2020-11-12 09:24:52,821 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=538, Invalid=2012, Unknown=0, NotChecked=0, Total=2550 [2020-11-12 09:24:52,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2020-11-12 09:24:52,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 2524. [2020-11-12 09:24:52,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2524 states, 2412 states have (on average 1.3254560530679933) internal successors, (3197), 2523 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:24:52,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 3197 transitions. [2020-11-12 09:24:52,876 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 3197 transitions. Word has length 63 [2020-11-12 09:24:52,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:24:52,877 INFO L481 AbstractCegarLoop]: Abstraction has 2524 states and 3197 transitions. [2020-11-12 09:24:52,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:24:52,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 3197 transitions. [2020-11-12 09:24:52,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:24:52,880 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:24:52,881 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:24:53,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:24:53,093 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:24:53,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:24:53,094 INFO L82 PathProgramCache]: Analyzing trace with hash -353231724, now seen corresponding path program 36 times [2020-11-12 09:24:53,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:24:53,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358628933] [2020-11-12 09:24:53,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:24:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:24:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:24:53,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358628933] [2020-11-12 09:24:53,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111895769] [2020-11-12 09:24:53,386 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 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 [2020-11-12 09:24:53,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-12 09:24:53,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:24:53,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:24:53,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:24:57,970 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:58,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:24:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:24:58,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:24:58,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-11-12 09:24:58,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983858231] [2020-11-12 09:24:58,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-12 09:24:58,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:24:58,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-12 09:24:58,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=347, Unknown=2, NotChecked=0, Total=462 [2020-11-12 09:24:58,107 INFO L87 Difference]: Start difference. First operand 2524 states and 3197 transitions. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:01,080 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 44 [2020-11-12 09:25:03,199 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 41 [2020-11-12 09:25:07,795 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-12 09:25:07,973 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-11-12 09:25:18,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:25:18,949 INFO L93 Difference]: Finished difference Result 5926 states and 7068 transitions. [2020-11-12 09:25:18,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-12 09:25:18,950 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 09:25:18,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:25:18,955 INFO L225 Difference]: With dead ends: 5926 [2020-11-12 09:25:18,955 INFO L226 Difference]: Without dead ends: 5266 [2020-11-12 09:25:18,956 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=822, Invalid=2836, Unknown=2, NotChecked=0, Total=3660 [2020-11-12 09:25:18,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5266 states. [2020-11-12 09:25:18,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5266 to 2519. [2020-11-12 09:25:18,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2519 states, 2407 states have (on average 1.3253012048192772) internal successors, (3190), 2518 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:18,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 3190 transitions. [2020-11-12 09:25:18,994 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 3190 transitions. Word has length 63 [2020-11-12 09:25:18,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:25:18,994 INFO L481 AbstractCegarLoop]: Abstraction has 2519 states and 3190 transitions. [2020-11-12 09:25:18,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:18,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 3190 transitions. [2020-11-12 09:25:18,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:25:18,997 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:25:18,997 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-11-12 09:25:19,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-11-12 09:25:19,198 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:25:19,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:25:19,198 INFO L82 PathProgramCache]: Analyzing trace with hash 682209354, now seen corresponding path program 37 times [2020-11-12 09:25:19,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:25:19,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455979797] [2020-11-12 09:25:19,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:25:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:25:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:25:19,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455979797] [2020-11-12 09:25:19,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781571392] [2020-11-12 09:25:19,527 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 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 [2020-11-12 09:25:19,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:25:19,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:25:19,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:25:22,234 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:22,449 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:22,467 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:25:22,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:25:22,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-11-12 09:25:22,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414061597] [2020-11-12 09:25:22,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-12 09:25:22,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:25:22,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-12 09:25:22,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=343, Unknown=1, NotChecked=0, Total=462 [2020-11-12 09:25:22,470 INFO L87 Difference]: Start difference. First operand 2519 states and 3190 transitions. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:33,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:25:33,301 INFO L93 Difference]: Finished difference Result 5506 states and 6645 transitions. [2020-11-12 09:25:33,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-12 09:25:33,305 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 09:25:33,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:25:33,310 INFO L225 Difference]: With dead ends: 5506 [2020-11-12 09:25:33,310 INFO L226 Difference]: Without dead ends: 4846 [2020-11-12 09:25:33,311 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=889, Invalid=3016, Unknown=1, NotChecked=0, Total=3906 [2020-11-12 09:25:33,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4846 states. [2020-11-12 09:25:33,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4846 to 2519. [2020-11-12 09:25:33,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2519 states, 2407 states have (on average 1.3253012048192772) internal successors, (3190), 2518 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:33,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 3190 transitions. [2020-11-12 09:25:33,350 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 3190 transitions. Word has length 63 [2020-11-12 09:25:33,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:25:33,351 INFO L481 AbstractCegarLoop]: Abstraction has 2519 states and 3190 transitions. [2020-11-12 09:25:33,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:33,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 3190 transitions. [2020-11-12 09:25:33,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:25:33,354 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:25:33,354 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:25:33,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:25:33,556 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:25:33,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:25:33,556 INFO L82 PathProgramCache]: Analyzing trace with hash -2090324964, now seen corresponding path program 38 times [2020-11-12 09:25:33,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:25:33,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687131960] [2020-11-12 09:25:33,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:25:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:25:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:25:33,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687131960] [2020-11-12 09:25:33,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38008396] [2020-11-12 09:25:33,884 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 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 [2020-11-12 09:25:33,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:25:33,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:25:33,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:25:33,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:25:34,363 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:34,434 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:25:34,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:25:34,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-11-12 09:25:34,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052968648] [2020-11-12 09:25:34,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-12 09:25:34,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:25:34,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-12 09:25:34,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-11-12 09:25:34,454 INFO L87 Difference]: Start difference. First operand 2519 states and 3190 transitions. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:38,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:25:38,284 INFO L93 Difference]: Finished difference Result 5959 states and 7119 transitions. [2020-11-12 09:25:38,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-12 09:25:38,285 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 09:25:38,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:25:38,290 INFO L225 Difference]: With dead ends: 5959 [2020-11-12 09:25:38,291 INFO L226 Difference]: Without dead ends: 5299 [2020-11-12 09:25:38,291 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1050, Invalid=3372, Unknown=0, NotChecked=0, Total=4422 [2020-11-12 09:25:38,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5299 states. [2020-11-12 09:25:38,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5299 to 2535. [2020-11-12 09:25:38,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2535 states, 2423 states have (on average 1.3260420965744943) internal successors, (3213), 2534 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:38,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2535 states to 2535 states and 3213 transitions. [2020-11-12 09:25:38,331 INFO L78 Accepts]: Start accepts. Automaton has 2535 states and 3213 transitions. Word has length 63 [2020-11-12 09:25:38,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:25:38,331 INFO L481 AbstractCegarLoop]: Abstraction has 2535 states and 3213 transitions. [2020-11-12 09:25:38,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:38,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2535 states and 3213 transitions. [2020-11-12 09:25:38,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:25:38,334 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:25:38,334 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:25:38,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-12 09:25:38,548 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:25:38,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:25:38,548 INFO L82 PathProgramCache]: Analyzing trace with hash -871777900, now seen corresponding path program 39 times [2020-11-12 09:25:38,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:25:38,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072423866] [2020-11-12 09:25:38,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:25:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:25:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:25:38,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072423866] [2020-11-12 09:25:38,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196067364] [2020-11-12 09:25:38,835 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 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 [2020-11-12 09:25:38,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 09:25:38,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:25:38,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:25:38,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:25:39,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:39,482 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:39,485 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:39,487 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:39,491 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:39,494 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:39,497 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:39,499 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:25:39,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:25:39,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:25:39,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609663537] [2020-11-12 09:25:39,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:25:39,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:25:39,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:25:39,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:25:39,599 INFO L87 Difference]: Start difference. First operand 2535 states and 3213 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:41,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:25:41,984 INFO L93 Difference]: Finished difference Result 4611 states and 5609 transitions. [2020-11-12 09:25:41,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-12 09:25:41,985 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 09:25:41,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:25:41,990 INFO L225 Difference]: With dead ends: 4611 [2020-11-12 09:25:41,990 INFO L226 Difference]: Without dead ends: 4453 [2020-11-12 09:25:41,991 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=583, Invalid=2069, Unknown=0, NotChecked=0, Total=2652 [2020-11-12 09:25:41,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4453 states. [2020-11-12 09:25:42,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4453 to 2544. [2020-11-12 09:25:42,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2544 states, 2432 states have (on average 1.3273026315789473) internal successors, (3228), 2543 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:42,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2544 states to 2544 states and 3228 transitions. [2020-11-12 09:25:42,029 INFO L78 Accepts]: Start accepts. Automaton has 2544 states and 3228 transitions. Word has length 63 [2020-11-12 09:25:42,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:25:42,029 INFO L481 AbstractCegarLoop]: Abstraction has 2544 states and 3228 transitions. [2020-11-12 09:25:42,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:42,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2544 states and 3228 transitions. [2020-11-12 09:25:42,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:25:42,031 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:25:42,031 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:25:42,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-11-12 09:25:42,232 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:25:42,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:25:42,233 INFO L82 PathProgramCache]: Analyzing trace with hash -558073124, now seen corresponding path program 40 times [2020-11-12 09:25:42,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:25:42,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162598431] [2020-11-12 09:25:42,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:25:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:25:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:25:42,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162598431] [2020-11-12 09:25:42,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77474754] [2020-11-12 09:25:42,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:25:42,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:25:42,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:25:42,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:25:42,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:25:43,120 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:25:43,321 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:25:43,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:25:43,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-11-12 09:25:43,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115720793] [2020-11-12 09:25:43,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-12 09:25:43,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:25:43,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-12 09:25:43,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2020-11-12 09:25:43,336 INFO L87 Difference]: Start difference. First operand 2544 states and 3228 transitions. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:48,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:25:48,312 INFO L93 Difference]: Finished difference Result 6386 states and 7690 transitions. [2020-11-12 09:25:48,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-12 09:25:48,313 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 09:25:48,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:25:48,319 INFO L225 Difference]: With dead ends: 6386 [2020-11-12 09:25:48,319 INFO L226 Difference]: Without dead ends: 5686 [2020-11-12 09:25:48,320 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1271, Invalid=4279, Unknown=0, NotChecked=0, Total=5550 [2020-11-12 09:25:48,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2020-11-12 09:25:48,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 2553. [2020-11-12 09:25:48,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2553 states, 2441 states have (on average 1.3289635395329782) internal successors, (3244), 2552 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:48,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 3244 transitions. [2020-11-12 09:25:48,360 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 3244 transitions. Word has length 63 [2020-11-12 09:25:48,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:25:48,360 INFO L481 AbstractCegarLoop]: Abstraction has 2553 states and 3244 transitions. [2020-11-12 09:25:48,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:48,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 3244 transitions. [2020-11-12 09:25:48,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:25:48,362 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:25:48,362 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:25:48,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-12 09:25:48,563 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:25:48,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:25:48,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1020357902, now seen corresponding path program 41 times [2020-11-12 09:25:48,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:25:48,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872229922] [2020-11-12 09:25:48,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:25:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:25:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:25:48,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872229922] [2020-11-12 09:25:48,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741905644] [2020-11-12 09:25:48,860 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 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 [2020-11-12 09:25:48,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 09:25:48,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:25:48,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:25:48,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:25:49,540 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:49,545 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:49,552 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:49,645 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:25:49,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:25:49,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:25:49,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472853185] [2020-11-12 09:25:49,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:25:49,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:25:49,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:25:49,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:25:49,671 INFO L87 Difference]: Start difference. First operand 2553 states and 3244 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:51,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:25:51,137 INFO L93 Difference]: Finished difference Result 4201 states and 5142 transitions. [2020-11-12 09:25:51,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-12 09:25:51,139 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 09:25:51,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:25:51,144 INFO L225 Difference]: With dead ends: 4201 [2020-11-12 09:25:51,144 INFO L226 Difference]: Without dead ends: 4043 [2020-11-12 09:25:51,144 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=357, Invalid=1283, Unknown=0, NotChecked=0, Total=1640 [2020-11-12 09:25:51,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4043 states. [2020-11-12 09:25:51,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4043 to 2559. [2020-11-12 09:25:51,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2559 states, 2447 states have (on average 1.3302002451982018) internal successors, (3255), 2558 states have internal predecessors, (3255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:51,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 3255 transitions. [2020-11-12 09:25:51,175 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 3255 transitions. Word has length 63 [2020-11-12 09:25:51,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:25:51,176 INFO L481 AbstractCegarLoop]: Abstraction has 2559 states and 3255 transitions. [2020-11-12 09:25:51,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:51,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 3255 transitions. [2020-11-12 09:25:51,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:25:51,178 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:25:51,178 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:25:51,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-11-12 09:25:51,379 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:25:51,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:25:51,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1177830746, now seen corresponding path program 42 times [2020-11-12 09:25:51,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:25:51,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483385031] [2020-11-12 09:25:51,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:25:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:25:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:25:51,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483385031] [2020-11-12 09:25:51,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244792939] [2020-11-12 09:25:51,747 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 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 [2020-11-12 09:25:51,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-12 09:25:51,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:25:51,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:25:51,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:25:52,254 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:25:52,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:52,396 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:25:52,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:25:52,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-11-12 09:25:52,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268633838] [2020-11-12 09:25:52,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-12 09:25:52,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:25:52,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-12 09:25:52,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-11-12 09:25:52,398 INFO L87 Difference]: Start difference. First operand 2559 states and 3255 transitions. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:57,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:25:57,367 INFO L93 Difference]: Finished difference Result 5904 states and 6954 transitions. [2020-11-12 09:25:57,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-11-12 09:25:57,370 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 09:25:57,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:25:57,375 INFO L225 Difference]: With dead ends: 5904 [2020-11-12 09:25:57,375 INFO L226 Difference]: Without dead ends: 5244 [2020-11-12 09:25:57,376 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2231 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1396, Invalid=4924, Unknown=0, NotChecked=0, Total=6320 [2020-11-12 09:25:57,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5244 states. [2020-11-12 09:25:57,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5244 to 2571. [2020-11-12 09:25:57,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2571 states, 2459 states have (on average 1.332248881659211) internal successors, (3276), 2570 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:57,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2571 states to 2571 states and 3276 transitions. [2020-11-12 09:25:57,412 INFO L78 Accepts]: Start accepts. Automaton has 2571 states and 3276 transitions. Word has length 63 [2020-11-12 09:25:57,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:25:57,412 INFO L481 AbstractCegarLoop]: Abstraction has 2571 states and 3276 transitions. [2020-11-12 09:25:57,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:25:57,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2571 states and 3276 transitions. [2020-11-12 09:25:57,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:25:57,414 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:25:57,414 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:25:57,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-12 09:25:57,615 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:25:57,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:25:57,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1101198898, now seen corresponding path program 43 times [2020-11-12 09:25:57,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:25:57,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745976876] [2020-11-12 09:25:57,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:25:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:25:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:25:57,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745976876] [2020-11-12 09:25:57,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639590554] [2020-11-12 09:25:57,993 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 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 [2020-11-12 09:25:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:25:58,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:25:58,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:25:58,776 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:58,778 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:58,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:25:58,862 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:25:58,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:25:58,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:25:58,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306991621] [2020-11-12 09:25:58,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:25:58,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:25:58,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:25:58,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:25:58,863 INFO L87 Difference]: Start difference. First operand 2571 states and 3276 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:26:01,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:26:01,925 INFO L93 Difference]: Finished difference Result 4416 states and 5413 transitions. [2020-11-12 09:26:01,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-12 09:26:01,928 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 09:26:01,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:26:01,933 INFO L225 Difference]: With dead ends: 4416 [2020-11-12 09:26:01,933 INFO L226 Difference]: Without dead ends: 4258 [2020-11-12 09:26:01,934 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=684, Invalid=2286, Unknown=0, NotChecked=0, Total=2970 [2020-11-12 09:26:01,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4258 states. [2020-11-12 09:26:01,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4258 to 2565. [2020-11-12 09:26:01,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2565 states, 2453 states have (on average 1.3326538931920098) internal successors, (3269), 2564 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:26:01,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2565 states to 2565 states and 3269 transitions. [2020-11-12 09:26:01,973 INFO L78 Accepts]: Start accepts. Automaton has 2565 states and 3269 transitions. Word has length 63 [2020-11-12 09:26:01,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:26:01,973 INFO L481 AbstractCegarLoop]: Abstraction has 2565 states and 3269 transitions. [2020-11-12 09:26:01,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:26:01,974 INFO L276 IsEmpty]: Start isEmpty. Operand 2565 states and 3269 transitions. [2020-11-12 09:26:01,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:26:01,976 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:26:01,977 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:26:02,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:26:02,192 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:26:02,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:26:02,192 INFO L82 PathProgramCache]: Analyzing trace with hash 386116132, now seen corresponding path program 44 times [2020-11-12 09:26:02,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:26:02,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694340729] [2020-11-12 09:26:02,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:26:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:26:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:26:02,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694340729] [2020-11-12 09:26:02,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745249109] [2020-11-12 09:26:02,521 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 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 [2020-11-12 09:26:02,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:26:02,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:26:02,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:26:02,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:26:03,112 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:26:07,318 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 22 [2020-11-12 09:26:07,323 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:26:07,336 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:26:07,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:26:07,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:26:07,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284235139] [2020-11-12 09:26:07,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:26:07,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:26:07,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:26:07,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=386, Unknown=1, NotChecked=0, Total=506 [2020-11-12 09:26:07,337 INFO L87 Difference]: Start difference. First operand 2565 states and 3269 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:26:12,079 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-11-12 09:26:18,914 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 34 [2020-11-12 09:26:29,859 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-12 09:26:34,079 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-11-12 09:26:54,736 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-11-12 09:27:13,252 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-11-12 09:27:34,224 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-11-12 09:27:40,365 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 33 [2020-11-12 09:27:54,859 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-11-12 09:28:33,714 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2020-11-12 09:29:09,792 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 34 [2020-11-12 09:29:44,691 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-11-12 09:29:52,959 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-11-12 09:30:31,707 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2020-11-12 09:31:32,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:31:32,115 INFO L93 Difference]: Finished difference Result 5957 states and 7237 transitions. [2020-11-12 09:31:32,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-11-12 09:31:32,117 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 09:31:32,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:31:32,122 INFO L225 Difference]: With dead ends: 5957 [2020-11-12 09:31:32,122 INFO L226 Difference]: Without dead ends: 5276 [2020-11-12 09:31:32,123 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2557 ImplicationChecksByTransitivity, 162.6s TimeCoverageRelationStatistics Valid=1500, Invalid=5425, Unknown=47, NotChecked=0, Total=6972 [2020-11-12 09:31:32,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2020-11-12 09:31:32,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 2561. [2020-11-12 09:31:32,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2449 states have (on average 1.3311555737035525) internal successors, (3260), 2560 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:31:32,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 3260 transitions. [2020-11-12 09:31:32,158 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 3260 transitions. Word has length 63 [2020-11-12 09:31:32,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:31:32,158 INFO L481 AbstractCegarLoop]: Abstraction has 2561 states and 3260 transitions. [2020-11-12 09:31:32,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:31:32,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 3260 transitions. [2020-11-12 09:31:32,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:31:32,160 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:31:32,160 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-11-12 09:31:32,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:31:32,361 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:31:32,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:31:32,361 INFO L82 PathProgramCache]: Analyzing trace with hash -657608618, now seen corresponding path program 45 times [2020-11-12 09:31:32,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:31:32,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977694138] [2020-11-12 09:31:32,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:31:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:31:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:31:32,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977694138] [2020-11-12 09:31:32,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163082194] [2020-11-12 09:31:32,706 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 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 [2020-11-12 09:31:32,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-12 09:31:32,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:31:32,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:31:32,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:31:33,193 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:31:33,223 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:31:33,233 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:31:33,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:31:33,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-11-12 09:31:33,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759886090] [2020-11-12 09:31:33,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-12 09:31:33,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:31:33,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-12 09:31:33,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2020-11-12 09:31:33,234 INFO L87 Difference]: Start difference. First operand 2561 states and 3260 transitions. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:31:38,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:31:38,008 INFO L93 Difference]: Finished difference Result 5495 states and 6655 transitions. [2020-11-12 09:31:38,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-12 09:31:38,008 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 09:31:38,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:31:38,013 INFO L225 Difference]: With dead ends: 5495 [2020-11-12 09:31:38,013 INFO L226 Difference]: Without dead ends: 4835 [2020-11-12 09:31:38,014 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1348, Invalid=4054, Unknown=0, NotChecked=0, Total=5402 [2020-11-12 09:31:38,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4835 states. [2020-11-12 09:31:38,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4835 to 2572. [2020-11-12 09:31:38,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2572 states, 2460 states have (on average 1.3317073170731708) internal successors, (3276), 2571 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:31:38,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2572 states to 2572 states and 3276 transitions. [2020-11-12 09:31:38,049 INFO L78 Accepts]: Start accepts. Automaton has 2572 states and 3276 transitions. Word has length 63 [2020-11-12 09:31:38,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:31:38,049 INFO L481 AbstractCegarLoop]: Abstraction has 2572 states and 3276 transitions. [2020-11-12 09:31:38,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:31:38,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2572 states and 3276 transitions. [2020-11-12 09:31:38,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:31:38,051 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:31:38,051 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-11-12 09:31:38,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-11-12 09:31:38,252 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:31:38,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:31:38,252 INFO L82 PathProgramCache]: Analyzing trace with hash 560938446, now seen corresponding path program 46 times [2020-11-12 09:31:38,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:31:38,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951213459] [2020-11-12 09:31:38,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:31:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:31:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:31:38,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951213459] [2020-11-12 09:31:38,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536904247] [2020-11-12 09:31:38,618 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 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 [2020-11-12 09:31:38,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:31:38,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:31:38,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:31:38,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:31:39,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:31:39,271 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:31:39,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:31:39,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:31:39,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735954347] [2020-11-12 09:31:39,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:31:39,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:31:39,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:31:39,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:31:39,273 INFO L87 Difference]: Start difference. First operand 2572 states and 3276 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:31:41,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:31:41,868 INFO L93 Difference]: Finished difference Result 4553 states and 5569 transitions. [2020-11-12 09:31:41,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-12 09:31:41,869 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 09:31:41,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:31:41,874 INFO L225 Difference]: With dead ends: 4553 [2020-11-12 09:31:41,874 INFO L226 Difference]: Without dead ends: 4395 [2020-11-12 09:31:41,874 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=635, Invalid=2227, Unknown=0, NotChecked=0, Total=2862 [2020-11-12 09:31:41,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4395 states. [2020-11-12 09:31:41,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4395 to 2599. [2020-11-12 09:31:41,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2599 states, 2487 states have (on average 1.3281061519903499) internal successors, (3303), 2598 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:31:41,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 3303 transitions. [2020-11-12 09:31:41,908 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 3303 transitions. Word has length 63 [2020-11-12 09:31:41,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:31:41,908 INFO L481 AbstractCegarLoop]: Abstraction has 2599 states and 3303 transitions. [2020-11-12 09:31:41,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:31:41,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 3303 transitions. [2020-11-12 09:31:41,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 09:31:41,910 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:31:41,911 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-11-12 09:31:42,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:31:42,111 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:31:42,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:31:42,112 INFO L82 PathProgramCache]: Analyzing trace with hash 874643222, now seen corresponding path program 47 times [2020-11-12 09:31:42,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:31:42,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142239950] [2020-11-12 09:31:42,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:31:42,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:31:42,586 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:31:42,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142239950] [2020-11-12 09:31:42,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177160143] [2020-11-12 09:31:42,587 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 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 [2020-11-12 09:31:42,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-12 09:31:42,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:31:42,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:31:42,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:31:43,141 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:31:43,146 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:31:43,149 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:31:45,409 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:31:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:31:45,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:31:45,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 09:31:45,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338943463] [2020-11-12 09:31:45,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:31:45,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:31:45,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:31:45,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=395, Unknown=1, NotChecked=0, Total=506 [2020-11-12 09:31:45,541 INFO L87 Difference]: Start difference. First operand 2599 states and 3303 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:31:47,015 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 24 [2020-11-12 09:31:51,374 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-11-12 09:31:53,478 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 45 [2020-11-12 09:31:54,262 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 23 [2020-11-12 09:31:59,148 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-11-12 09:32:06,193 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-11-12 09:32:22,738 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 46 [2020-11-12 09:32:51,816 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-11-12 09:33:47,572 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-11-12 09:34:38,479 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 52 [2020-11-12 09:34:42,604 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 42 Received shutdown request... [2020-11-12 09:34:53,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-11-12 09:34:53,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-11-12 09:34:53,224 WARN L546 AbstractCegarLoop]: Verification canceled [2020-11-12 09:34:53,229 WARN L250 ceAbstractionStarter]: Timeout [2020-11-12 09:34:53,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 09:34:53 BasicIcfg [2020-11-12 09:34:53,230 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-12 09:34:53,231 INFO L168 Benchmark]: Toolchain (without parser) took 849965.87 ms. Allocated memory was 302.0 MB in the beginning and 444.6 MB in the end (delta: 142.6 MB). Free memory was 276.3 MB in the beginning and 342.9 MB in the end (delta: -66.7 MB). Peak memory consumption was 76.4 MB. Max. memory is 16.0 GB. [2020-11-12 09:34:53,231 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 302.0 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 16.0 GB. [2020-11-12 09:34:53,231 INFO L168 Benchmark]: CACSL2BoogieTranslator took 826.61 ms. Allocated memory is still 302.0 MB. Free memory was 275.7 MB in the beginning and 246.6 MB in the end (delta: 29.1 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. [2020-11-12 09:34:53,231 INFO L168 Benchmark]: Boogie Procedure Inliner took 86.42 ms. Allocated memory is still 302.0 MB. Free memory was 246.6 MB in the beginning and 244.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-12 09:34:53,232 INFO L168 Benchmark]: Boogie Preprocessor took 61.17 ms. Allocated memory is still 302.0 MB. Free memory was 244.8 MB in the beginning and 243.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.0 GB. [2020-11-12 09:34:53,232 INFO L168 Benchmark]: RCFGBuilder took 533.97 ms. Allocated memory is still 302.0 MB. Free memory was 243.5 MB in the beginning and 267.3 MB in the end (delta: -23.8 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.0 GB. [2020-11-12 09:34:53,232 INFO L168 Benchmark]: TraceAbstraction took 848442.17 ms. Allocated memory was 302.0 MB in the beginning and 444.6 MB in the end (delta: 142.6 MB). Free memory was 266.2 MB in the beginning and 342.9 MB in the end (delta: -76.7 MB). Peak memory consumption was 65.2 MB. Max. memory is 16.0 GB. [2020-11-12 09:34:53,233 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 302.0 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 826.61 ms. Allocated memory is still 302.0 MB. Free memory was 275.7 MB in the beginning and 246.6 MB in the end (delta: 29.1 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 86.42 ms. Allocated memory is still 302.0 MB. Free memory was 246.6 MB in the beginning and 244.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 61.17 ms. Allocated memory is still 302.0 MB. Free memory was 244.8 MB in the beginning and 243.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 533.97 ms. Allocated memory is still 302.0 MB. Free memory was 243.5 MB in the beginning and 267.3 MB in the end (delta: -23.8 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 848442.17 ms. Allocated memory was 302.0 MB in the beginning and 444.6 MB in the end (delta: 142.6 MB). Free memory was 266.2 MB in the beginning and 342.9 MB in the end (delta: -76.7 MB). Peak memory consumption was 65.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 12]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 12). Cancelled while BasicCegarLoop was constructing difference of abstraction (2599states) and FLOYD_HOARE automaton (currently 53 states, 23 states before enhancement),while ReachableStatesComputation was computing reachable states (2175 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 848.3s, OverallIterations: 65, TraceHistogramMax: 6, AutomataDifference: 775.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.4s, HoareTripleCheckerStatistics: 5356 SDtfs, 37219 SDslu, 55215 SDs, 0 SdLazy, 11463 SolverSat, 4163 SolverUnsat, 184 SolverUnknown, 0 SolverNotchecked, 366.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5866 GetRequests, 2952 SyntacticMatches, 26 SemanticMatches, 2888 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46759 ImplicationChecksByTransitivity, 438.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7179occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.6s AutomataMinimizationTime, 64 MinimizatonAttempts, 99445 StatesRemovedByMinimization, 64 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 51.0s InterpolantComputationTime, 6980 NumberOfCodeBlocks, 6980 NumberOfCodeBlocksAsserted, 227 NumberOfCheckSat, 6855 ConstructedInterpolants, 13 QuantifiedInterpolants, 3133759 SizeOfPredicates, 246 NumberOfNonLiveVariables, 8271 ConjunctsInSsa, 777 ConjunctsInUnsatCore, 125 InterpolantComputations, 5 PerfectInterpolantSequences, 0/2802 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown