/usr/bin/java -Xmx8000000000 -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/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7a177ad [2020-11-09 13:29:53,669 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-09 13:29:53,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-09 13:29:53,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-09 13:29:53,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-09 13:29:53,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-09 13:29:53,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-09 13:29:53,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-09 13:29:53,756 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-09 13:29:53,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-09 13:29:53,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-09 13:29:53,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-09 13:29:53,767 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-09 13:29:53,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-09 13:29:53,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-09 13:29:53,774 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-09 13:29:53,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-09 13:29:53,780 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-09 13:29:53,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-09 13:29:53,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-09 13:29:53,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-09 13:29:53,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-09 13:29:53,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-09 13:29:53,804 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-09 13:29:53,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-09 13:29:53,814 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-09 13:29:53,815 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-09 13:29:53,817 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-09 13:29:53,818 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-09 13:29:53,819 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-09 13:29:53,819 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-09 13:29:53,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-09 13:29:53,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-09 13:29:53,824 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-09 13:29:53,825 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-09 13:29:53,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-09 13:29:53,826 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-09 13:29:53,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-09 13:29:53,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-09 13:29:53,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-09 13:29:53,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-09 13:29:53,830 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-11-09 13:29:53,885 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-09 13:29:53,886 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-09 13:29:53,890 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-09 13:29:53,890 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-09 13:29:53,890 INFO L138 SettingsManager]: * Use SBE=true [2020-11-09 13:29:53,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-09 13:29:53,891 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-09 13:29:53,891 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-09 13:29:53,891 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-09 13:29:53,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-09 13:29:53,893 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-09 13:29:53,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-09 13:29:53,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-09 13:29:53,894 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-09 13:29:53,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-09 13:29:53,895 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-09 13:29:53,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-09 13:29:53,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-09 13:29:53,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-09 13:29:53,896 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-09 13:29:53,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-09 13:29:53,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-09 13:29:53,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-09 13:29:53,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-11-09 13:29:53,898 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-09 13:29:53,898 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-09 13:29:53,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-09 13:29:53,898 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-11-09 13:29:53,899 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-09 13:29:54,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-09 13:29:54,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-09 13:29:54,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-09 13:29:54,411 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-09 13:29:54,412 INFO L275 PluginConnector]: CDTParser initialized [2020-11-09 13:29:54,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-11-09 13:29:54,492 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bd9ba5fb/f27eb75d1a6a44759a6a7351efe031c1/FLAGb111d598e [2020-11-09 13:29:55,158 INFO L306 CDTParser]: Found 1 translation units. [2020-11-09 13:29:55,159 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-11-09 13:29:55,179 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bd9ba5fb/f27eb75d1a6a44759a6a7351efe031c1/FLAGb111d598e [2020-11-09 13:29:55,429 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bd9ba5fb/f27eb75d1a6a44759a6a7351efe031c1 [2020-11-09 13:29:55,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-09 13:29:55,442 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-09 13:29:55,446 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-09 13:29:55,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-09 13:29:55,450 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-09 13:29:55,452 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:29:55" (1/1) ... [2020-11-09 13:29:55,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cac64ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:55, skipping insertion in model container [2020-11-09 13:29:55,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:29:55" (1/1) ... [2020-11-09 13:29:55,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-09 13:29:55,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-09 13:29:56,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 13:29:56,089 INFO L203 MainTranslator]: Completed pre-run [2020-11-09 13:29:56,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 13:29:56,267 INFO L208 MainTranslator]: Completed translation [2020-11-09 13:29:56,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:56 WrapperNode [2020-11-09 13:29:56,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-09 13:29:56,269 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-09 13:29:56,269 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-09 13:29:56,269 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-09 13:29:56,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:56" (1/1) ... [2020-11-09 13:29:56,293 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:56" (1/1) ... [2020-11-09 13:29:56,314 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-09 13:29:56,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-09 13:29:56,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-09 13:29:56,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-09 13:29:56,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:56" (1/1) ... [2020-11-09 13:29:56,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:56" (1/1) ... [2020-11-09 13:29:56,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:56" (1/1) ... [2020-11-09 13:29:56,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:56" (1/1) ... [2020-11-09 13:29:56,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:56" (1/1) ... [2020-11-09 13:29:56,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:56" (1/1) ... [2020-11-09 13:29:56,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:56" (1/1) ... [2020-11-09 13:29:56,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-09 13:29:56,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-09 13:29:56,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-09 13:29:56,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-09 13:29:56,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:56" (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 [2020-11-09 13:29:56,432 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-09 13:29:56,432 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-09 13:29:56,432 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-09 13:29:56,432 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-09 13:29:56,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-09 13:29:56,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-09 13:29:56,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-09 13:29:56,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-09 13:29:56,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-09 13:29:56,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-09 13:29:56,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-09 13:29:56,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-09 13:29:56,436 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-09 13:29:56,960 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-09 13:29:56,960 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-09 13:29:56,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:29:56 BoogieIcfgContainer [2020-11-09 13:29:56,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-09 13:29:56,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-09 13:29:56,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-09 13:29:56,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-09 13:29:56,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 01:29:55" (1/3) ... [2020-11-09 13:29:56,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a11b95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:29:56, skipping insertion in model container [2020-11-09 13:29:56,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:56" (2/3) ... [2020-11-09 13:29:56,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a11b95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:29:56, skipping insertion in model container [2020-11-09 13:29:56,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:29:56" (3/3) ... [2020-11-09 13:29:56,973 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2020-11-09 13:29:56,989 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-09 13:29:56,989 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-09 13:29:56,993 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-09 13:29:56,994 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-09 13:29:57,042 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,042 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,043 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,043 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,043 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,043 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,044 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,044 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,045 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,045 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,046 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,046 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,047 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,047 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,047 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,048 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,049 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,049 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,050 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,050 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,050 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,050 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,050 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,051 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,051 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,051 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,051 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,051 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,052 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,053 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,053 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,054 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,054 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,054 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,054 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,054 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,055 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,055 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,056 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,056 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,056 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,056 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,057 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,057 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,058 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,058 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,058 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,058 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,059 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,059 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,060 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,060 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,060 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,060 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,060 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,061 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,063 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,064 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,064 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,064 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,065 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,065 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,077 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,077 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,077 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,078 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,078 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,079 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:57,083 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-09 13:29:57,096 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-09 13:29:57,134 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-09 13:29:57,134 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-09 13:29:57,134 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-09 13:29:57,134 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-09 13:29:57,135 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-09 13:29:57,135 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-09 13:29:57,135 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-09 13:29:57,135 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-09 13:29:57,150 INFO L128 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-11-09 13:29:57,151 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-09 13:29:57,155 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-09 13:29:57,158 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-11-09 13:29:57,223 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-11-09 13:29:57,225 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-09 13:29:57,232 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-11-09 13:29:57,237 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-11-09 13:29:58,950 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-09 13:29:59,687 WARN L194 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-11-09 13:29:59,793 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-09 13:30:00,028 WARN L194 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-11-09 13:30:00,141 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-09 13:30:00,563 WARN L194 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-11-09 13:30:00,721 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-09 13:30:01,068 WARN L194 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-11-09 13:30:01,211 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-09 13:30:01,252 INFO L131 LiptonReduction]: Checked pairs total: 1187 [2020-11-09 13:30:01,252 INFO L133 LiptonReduction]: Total number of compositions: 62 [2020-11-09 13:30:01,260 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-11-09 13:30:01,271 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-11-09 13:30:01,273 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-09 13:30:01,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-09 13:30:01,280 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:01,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-09 13:30:01,281 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:01,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:01,288 INFO L82 PathProgramCache]: Analyzing trace with hash -805875314, now seen corresponding path program 1 times [2020-11-09 13:30:01,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:01,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010384695] [2020-11-09 13:30:01,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:01,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010384695] [2020-11-09 13:30:01,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:30:01,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-09 13:30:01,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876577535] [2020-11-09 13:30:01,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-09 13:30:01,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:01,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-09 13:30:01,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-09 13:30:01,535 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-11-09 13:30:01,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:01,620 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-11-09 13:30:01,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-09 13:30:01,622 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-09 13:30:01,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:01,634 INFO L225 Difference]: With dead ends: 75 [2020-11-09 13:30:01,634 INFO L226 Difference]: Without dead ends: 42 [2020-11-09 13:30:01,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-09 13:30:01,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-09 13:30:01,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-09 13:30:01,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 13:30:01,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-11-09 13:30:01,679 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-11-09 13:30:01,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:01,680 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-11-09 13:30:01,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-09 13:30:01,680 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-11-09 13:30:01,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-09 13:30:01,681 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:01,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:01,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-09 13:30:01,682 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:01,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:01,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1351909113, now seen corresponding path program 1 times [2020-11-09 13:30:01,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:01,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989688224] [2020-11-09 13:30:01,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:01,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989688224] [2020-11-09 13:30:01,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:30:01,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-09 13:30:01,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947580655] [2020-11-09 13:30:01,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-09 13:30:01,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:01,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-09 13:30:01,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-09 13:30:01,845 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-11-09 13:30:01,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:01,890 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-11-09 13:30:01,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-09 13:30:01,891 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-09 13:30:01,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:01,892 INFO L225 Difference]: With dead ends: 56 [2020-11-09 13:30:01,892 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 13:30:01,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-11-09 13:30:01,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 13:30:01,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-09 13:30:01,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 13:30:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-11-09 13:30:01,901 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-11-09 13:30:01,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:01,903 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-11-09 13:30:01,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-09 13:30:01,903 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-11-09 13:30:01,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 13:30:01,904 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:01,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:01,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-09 13:30:01,905 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:01,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:01,905 INFO L82 PathProgramCache]: Analyzing trace with hash 2021583950, now seen corresponding path program 1 times [2020-11-09 13:30:01,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:01,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668160715] [2020-11-09 13:30:01,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:01,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:01,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668160715] [2020-11-09 13:30:01,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:30:01,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 13:30:01,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188516575] [2020-11-09 13:30:01,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-09 13:30:01,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:01,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-09 13:30:01,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-09 13:30:01,993 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-11-09 13:30:02,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:02,076 INFO L93 Difference]: Finished difference Result 54 states and 124 transitions. [2020-11-09 13:30:02,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 13:30:02,077 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-09 13:30:02,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:02,078 INFO L225 Difference]: With dead ends: 54 [2020-11-09 13:30:02,078 INFO L226 Difference]: Without dead ends: 47 [2020-11-09 13:30:02,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:30:02,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-09 13:30:02,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-11-09 13:30:02,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-09 13:30:02,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 106 transitions. [2020-11-09 13:30:02,087 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 106 transitions. Word has length 10 [2020-11-09 13:30:02,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:02,088 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 106 transitions. [2020-11-09 13:30:02,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-09 13:30:02,088 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 106 transitions. [2020-11-09 13:30:02,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 13:30:02,089 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:02,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:02,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-09 13:30:02,089 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:02,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:02,090 INFO L82 PathProgramCache]: Analyzing trace with hash 2101929440, now seen corresponding path program 2 times [2020-11-09 13:30:02,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:02,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469083994] [2020-11-09 13:30:02,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:02,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469083994] [2020-11-09 13:30:02,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:30:02,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 13:30:02,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356536964] [2020-11-09 13:30:02,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-09 13:30:02,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:02,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-09 13:30:02,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-09 13:30:02,185 INFO L87 Difference]: Start difference. First operand 45 states and 106 transitions. Second operand 6 states. [2020-11-09 13:30:02,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:02,280 INFO L93 Difference]: Finished difference Result 59 states and 138 transitions. [2020-11-09 13:30:02,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 13:30:02,280 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-09 13:30:02,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:02,282 INFO L225 Difference]: With dead ends: 59 [2020-11-09 13:30:02,282 INFO L226 Difference]: Without dead ends: 53 [2020-11-09 13:30:02,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:30:02,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-09 13:30:02,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2020-11-09 13:30:02,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 13:30:02,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 96 transitions. [2020-11-09 13:30:02,290 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 96 transitions. Word has length 10 [2020-11-09 13:30:02,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:02,290 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 96 transitions. [2020-11-09 13:30:02,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-09 13:30:02,291 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 96 transitions. [2020-11-09 13:30:02,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 13:30:02,291 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:02,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:02,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-09 13:30:02,292 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:02,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:02,293 INFO L82 PathProgramCache]: Analyzing trace with hash 2082353870, now seen corresponding path program 3 times [2020-11-09 13:30:02,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:02,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718044315] [2020-11-09 13:30:02,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:02,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718044315] [2020-11-09 13:30:02,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:30:02,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 13:30:02,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046353459] [2020-11-09 13:30:02,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-09 13:30:02,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:02,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-09 13:30:02,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-09 13:30:02,416 INFO L87 Difference]: Start difference. First operand 41 states and 96 transitions. Second operand 6 states. [2020-11-09 13:30:02,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:02,515 INFO L93 Difference]: Finished difference Result 65 states and 152 transitions. [2020-11-09 13:30:02,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 13:30:02,517 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-09 13:30:02,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:02,518 INFO L225 Difference]: With dead ends: 65 [2020-11-09 13:30:02,518 INFO L226 Difference]: Without dead ends: 52 [2020-11-09 13:30:02,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:30:02,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-09 13:30:02,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2020-11-09 13:30:02,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 13:30:02,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 99 transitions. [2020-11-09 13:30:02,536 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 99 transitions. Word has length 10 [2020-11-09 13:30:02,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:02,537 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 99 transitions. [2020-11-09 13:30:02,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-09 13:30:02,537 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 99 transitions. [2020-11-09 13:30:02,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 13:30:02,538 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:02,538 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:02,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-09 13:30:02,538 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:02,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:02,543 INFO L82 PathProgramCache]: Analyzing trace with hash 735328415, now seen corresponding path program 4 times [2020-11-09 13:30:02,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:02,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213839984] [2020-11-09 13:30:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:02,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213839984] [2020-11-09 13:30:02,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112494627] [2020-11-09 13:30:02,664 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 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 [2020-11-09 13:30:02,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:02,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:02,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 13:30:02,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:02,814 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:02,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:02,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:02,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-09 13:30:02,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443218706] [2020-11-09 13:30:02,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 13:30:02,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:02,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 13:30:02,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-09 13:30:02,833 INFO L87 Difference]: Start difference. First operand 41 states and 99 transitions. Second operand 8 states. [2020-11-09 13:30:03,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:03,214 INFO L93 Difference]: Finished difference Result 63 states and 147 transitions. [2020-11-09 13:30:03,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 13:30:03,214 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-09 13:30:03,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:03,215 INFO L225 Difference]: With dead ends: 63 [2020-11-09 13:30:03,216 INFO L226 Difference]: Without dead ends: 54 [2020-11-09 13:30:03,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-11-09 13:30:03,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-09 13:30:03,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-11-09 13:30:03,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-09 13:30:03,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 87 transitions. [2020-11-09 13:30:03,233 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 87 transitions. Word has length 11 [2020-11-09 13:30:03,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:03,233 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 87 transitions. [2020-11-09 13:30:03,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 13:30:03,233 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 87 transitions. [2020-11-09 13:30:03,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 13:30:03,234 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:03,234 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:03,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-09 13:30:03,456 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:03,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:03,457 INFO L82 PathProgramCache]: Analyzing trace with hash 128488628, now seen corresponding path program 5 times [2020-11-09 13:30:03,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:03,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969063450] [2020-11-09 13:30:03,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:03,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:03,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969063450] [2020-11-09 13:30:03,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148460847] [2020-11-09 13:30:03,555 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 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 [2020-11-09 13:30:03,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:03,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:03,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 13:30:03,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:03,660 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:03,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:03,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-09 13:30:03,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881289911] [2020-11-09 13:30:03,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 13:30:03,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:03,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 13:30:03,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-09 13:30:03,676 INFO L87 Difference]: Start difference. First operand 37 states and 87 transitions. Second operand 8 states. [2020-11-09 13:30:03,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:03,816 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-11-09 13:30:03,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-09 13:30:03,816 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-09 13:30:03,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:03,817 INFO L225 Difference]: With dead ends: 56 [2020-11-09 13:30:03,817 INFO L226 Difference]: Without dead ends: 51 [2020-11-09 13:30:03,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-11-09 13:30:03,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-09 13:30:03,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-11-09 13:30:03,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-09 13:30:03,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-11-09 13:30:03,824 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-11-09 13:30:03,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:03,824 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-11-09 13:30:03,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 13:30:03,824 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-11-09 13:30:03,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 13:30:03,825 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:03,825 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:04,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:04,027 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:04,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:04,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1416964401, now seen corresponding path program 6 times [2020-11-09 13:30:04,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:04,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270234660] [2020-11-09 13:30:04,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:04,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270234660] [2020-11-09 13:30:04,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663125878] [2020-11-09 13:30:04,137 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 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 [2020-11-09 13:30:04,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-09 13:30:04,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:04,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 13:30:04,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:04,212 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:04,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:04,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-09 13:30:04,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677723075] [2020-11-09 13:30:04,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 13:30:04,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:04,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 13:30:04,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-09 13:30:04,229 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-11-09 13:30:04,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:04,394 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-11-09 13:30:04,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-09 13:30:04,395 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-09 13:30:04,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:04,396 INFO L225 Difference]: With dead ends: 56 [2020-11-09 13:30:04,396 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 13:30:04,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-11-09 13:30:04,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 13:30:04,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-11-09 13:30:04,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-09 13:30:04,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-11-09 13:30:04,402 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-11-09 13:30:04,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:04,402 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-11-09 13:30:04,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 13:30:04,403 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-11-09 13:30:04,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 13:30:04,403 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:04,404 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:04,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:04,617 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:04,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:04,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1320372483, now seen corresponding path program 7 times [2020-11-09 13:30:04,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:04,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298522968] [2020-11-09 13:30:04,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:04,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:04,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298522968] [2020-11-09 13:30:04,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315011782] [2020-11-09 13:30:04,721 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 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 [2020-11-09 13:30:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:04,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 13:30:04,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:04,824 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:04,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:04,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-09 13:30:04,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798830418] [2020-11-09 13:30:04,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 13:30:04,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:04,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 13:30:04,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:30:04,839 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 9 states. [2020-11-09 13:30:05,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:05,048 INFO L93 Difference]: Finished difference Result 63 states and 149 transitions. [2020-11-09 13:30:05,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-09 13:30:05,049 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-09 13:30:05,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:05,050 INFO L225 Difference]: With dead ends: 63 [2020-11-09 13:30:05,051 INFO L226 Difference]: Without dead ends: 58 [2020-11-09 13:30:05,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:30:05,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-09 13:30:05,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-11-09 13:30:05,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 13:30:05,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-11-09 13:30:05,064 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 12 [2020-11-09 13:30:05,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:05,064 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-11-09 13:30:05,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 13:30:05,065 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-11-09 13:30:05,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 13:30:05,065 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:05,065 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:05,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:05,279 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:05,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:05,280 INFO L82 PathProgramCache]: Analyzing trace with hash -311794613, now seen corresponding path program 8 times [2020-11-09 13:30:05,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:05,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436647362] [2020-11-09 13:30:05,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:05,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436647362] [2020-11-09 13:30:05,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781280801] [2020-11-09 13:30:05,342 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 [2020-11-09 13:30:05,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:05,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:05,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 13:30:05,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:05,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:05,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:05,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-09 13:30:05,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348037761] [2020-11-09 13:30:05,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 13:30:05,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:05,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 13:30:05,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:30:05,460 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 9 states. [2020-11-09 13:30:05,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:05,724 INFO L93 Difference]: Finished difference Result 71 states and 167 transitions. [2020-11-09 13:30:05,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-09 13:30:05,725 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-09 13:30:05,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:05,726 INFO L225 Difference]: With dead ends: 71 [2020-11-09 13:30:05,726 INFO L226 Difference]: Without dead ends: 62 [2020-11-09 13:30:05,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:30:05,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-09 13:30:05,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2020-11-09 13:30:05,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-09 13:30:05,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-11-09 13:30:05,739 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 12 [2020-11-09 13:30:05,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:05,740 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-11-09 13:30:05,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 13:30:05,740 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-11-09 13:30:05,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 13:30:05,741 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:05,741 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:05,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-09 13:30:05,944 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:05,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:05,944 INFO L82 PathProgramCache]: Analyzing trace with hash -2018100772, now seen corresponding path program 9 times [2020-11-09 13:30:05,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:05,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903756205] [2020-11-09 13:30:05,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:06,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:06,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903756205] [2020-11-09 13:30:06,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137269824] [2020-11-09 13:30:06,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:06,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-09 13:30:06,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:06,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 13:30:06,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:06,140 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:06,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:06,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:06,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-09 13:30:06,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768455791] [2020-11-09 13:30:06,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 13:30:06,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:06,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 13:30:06,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-09 13:30:06,157 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-11-09 13:30:06,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:06,471 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-11-09 13:30:06,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 13:30:06,472 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-09 13:30:06,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:06,473 INFO L225 Difference]: With dead ends: 72 [2020-11-09 13:30:06,473 INFO L226 Difference]: Without dead ends: 63 [2020-11-09 13:30:06,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:30:06,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-09 13:30:06,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-11-09 13:30:06,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 13:30:06,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-11-09 13:30:06,482 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 13 [2020-11-09 13:30:06,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:06,482 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-11-09 13:30:06,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 13:30:06,482 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-11-09 13:30:06,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 13:30:06,483 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:06,483 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:06,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:06,698 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:06,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:06,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1075670313, now seen corresponding path program 10 times [2020-11-09 13:30:06,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:06,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35823039] [2020-11-09 13:30:06,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:06,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35823039] [2020-11-09 13:30:06,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224460342] [2020-11-09 13:30:06,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:06,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:06,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:06,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 13:30:06,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:06,876 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:06,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:06,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-09 13:30:06,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595330460] [2020-11-09 13:30:06,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 13:30:06,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:06,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 13:30:06,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-09 13:30:06,924 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 10 states. [2020-11-09 13:30:07,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:07,171 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-11-09 13:30:07,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-09 13:30:07,171 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-09 13:30:07,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:07,172 INFO L225 Difference]: With dead ends: 64 [2020-11-09 13:30:07,172 INFO L226 Difference]: Without dead ends: 59 [2020-11-09 13:30:07,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-11-09 13:30:07,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-09 13:30:07,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-11-09 13:30:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 13:30:07,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-11-09 13:30:07,185 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-11-09 13:30:07,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:07,185 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-11-09 13:30:07,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 13:30:07,185 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-11-09 13:30:07,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 13:30:07,192 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:07,193 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:07,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:07,394 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:07,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:07,395 INFO L82 PathProgramCache]: Analyzing trace with hash 198162772, now seen corresponding path program 11 times [2020-11-09 13:30:07,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:07,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963147754] [2020-11-09 13:30:07,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:07,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:07,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963147754] [2020-11-09 13:30:07,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081454547] [2020-11-09 13:30:07,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:07,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-09 13:30:07,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:07,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 13:30:07,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:07,585 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:07,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:07,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-09 13:30:07,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264799096] [2020-11-09 13:30:07,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 13:30:07,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:07,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 13:30:07,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-09 13:30:07,606 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-11-09 13:30:07,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:07,771 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-09 13:30:07,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 13:30:07,772 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-09 13:30:07,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:07,773 INFO L225 Difference]: With dead ends: 64 [2020-11-09 13:30:07,773 INFO L226 Difference]: Without dead ends: 58 [2020-11-09 13:30:07,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-11-09 13:30:07,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-09 13:30:07,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-11-09 13:30:07,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-09 13:30:07,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-11-09 13:30:07,786 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-11-09 13:30:07,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:07,787 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-11-09 13:30:07,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 13:30:07,787 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-11-09 13:30:07,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 13:30:07,788 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:07,788 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:08,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-09 13:30:08,001 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:08,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:08,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1863413606, now seen corresponding path program 12 times [2020-11-09 13:30:08,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:08,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400568382] [2020-11-09 13:30:08,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:08,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400568382] [2020-11-09 13:30:08,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264878071] [2020-11-09 13:30:08,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:08,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-09 13:30:08,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:08,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 13:30:08,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:08,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:08,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:08,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:08,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-09 13:30:08,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389974747] [2020-11-09 13:30:08,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 13:30:08,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:08,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 13:30:08,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-09 13:30:08,243 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 11 states. [2020-11-09 13:30:08,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:08,551 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-11-09 13:30:08,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-09 13:30:08,551 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-09 13:30:08,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:08,552 INFO L225 Difference]: With dead ends: 73 [2020-11-09 13:30:08,552 INFO L226 Difference]: Without dead ends: 68 [2020-11-09 13:30:08,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-11-09 13:30:08,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-09 13:30:08,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2020-11-09 13:30:08,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-09 13:30:08,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-11-09 13:30:08,559 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 14 [2020-11-09 13:30:08,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:08,560 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-11-09 13:30:08,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 13:30:08,560 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-11-09 13:30:08,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 13:30:08,560 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:08,561 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:08,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:08,772 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:08,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:08,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1013983880, now seen corresponding path program 13 times [2020-11-09 13:30:08,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:08,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499053990] [2020-11-09 13:30:08,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:08,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499053990] [2020-11-09 13:30:08,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388512894] [2020-11-09 13:30:08,849 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:08,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 13:30:08,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:08,933 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:08,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:08,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-09 13:30:08,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116026525] [2020-11-09 13:30:08,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 13:30:08,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:08,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 13:30:08,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-11-09 13:30:08,945 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 11 states. [2020-11-09 13:30:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:09,286 INFO L93 Difference]: Finished difference Result 81 states and 191 transitions. [2020-11-09 13:30:09,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-09 13:30:09,291 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-09 13:30:09,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:09,292 INFO L225 Difference]: With dead ends: 81 [2020-11-09 13:30:09,292 INFO L226 Difference]: Without dead ends: 72 [2020-11-09 13:30:09,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-11-09 13:30:09,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-11-09 13:30:09,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-11-09 13:30:09,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 13:30:09,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-11-09 13:30:09,297 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 14 [2020-11-09 13:30:09,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:09,297 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-11-09 13:30:09,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 13:30:09,297 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-11-09 13:30:09,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-09 13:30:09,298 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:09,298 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:09,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-09 13:30:09,508 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:09,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:09,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1931272153, now seen corresponding path program 14 times [2020-11-09 13:30:09,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:09,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068148467] [2020-11-09 13:30:09,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:09,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068148467] [2020-11-09 13:30:09,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323963266] [2020-11-09 13:30:09,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:09,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:09,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:09,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 13:30:09,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:09,679 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:09,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:09,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-09 13:30:09,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892643484] [2020-11-09 13:30:09,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 13:30:09,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:09,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 13:30:09,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-11-09 13:30:09,707 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-11-09 13:30:10,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:10,129 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-11-09 13:30:10,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 13:30:10,133 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-09 13:30:10,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:10,134 INFO L225 Difference]: With dead ends: 82 [2020-11-09 13:30:10,134 INFO L226 Difference]: Without dead ends: 73 [2020-11-09 13:30:10,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-11-09 13:30:10,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-09 13:30:10,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-11-09 13:30:10,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-09 13:30:10,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-11-09 13:30:10,139 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 15 [2020-11-09 13:30:10,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:10,139 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-11-09 13:30:10,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 13:30:10,139 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-11-09 13:30:10,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-09 13:30:10,140 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:10,140 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:10,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-09 13:30:10,351 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:10,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:10,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1368757306, now seen corresponding path program 15 times [2020-11-09 13:30:10,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:10,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19693863] [2020-11-09 13:30:10,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:10,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19693863] [2020-11-09 13:30:10,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125650081] [2020-11-09 13:30:10,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:10,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-09 13:30:10,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:10,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 13:30:10,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:10,528 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:10,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:10,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-09 13:30:10,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105484372] [2020-11-09 13:30:10,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 13:30:10,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:10,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 13:30:10,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-09 13:30:10,543 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 12 states. [2020-11-09 13:30:10,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:10,844 INFO L93 Difference]: Finished difference Result 72 states and 173 transitions. [2020-11-09 13:30:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-09 13:30:10,844 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-09 13:30:10,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:10,845 INFO L225 Difference]: With dead ends: 72 [2020-11-09 13:30:10,845 INFO L226 Difference]: Without dead ends: 67 [2020-11-09 13:30:10,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-11-09 13:30:10,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-09 13:30:10,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-11-09 13:30:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-09 13:30:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-11-09 13:30:10,853 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-11-09 13:30:10,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:10,854 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-11-09 13:30:10,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 13:30:10,854 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-11-09 13:30:10,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 13:30:10,854 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:10,854 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:11,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-09 13:30:11,064 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:11,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:11,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1455869111, now seen corresponding path program 16 times [2020-11-09 13:30:11,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:11,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507147980] [2020-11-09 13:30:11,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:11,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507147980] [2020-11-09 13:30:11,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157146116] [2020-11-09 13:30:11,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-09 13:30:11,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:11,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:11,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 13:30:11,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:11,264 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:11,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:11,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:11,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-09 13:30:11,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036053389] [2020-11-09 13:30:11,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 13:30:11,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:11,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 13:30:11,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-09 13:30:11,286 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-11-09 13:30:11,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:11,481 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-11-09 13:30:11,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-09 13:30:11,482 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-11-09 13:30:11,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:11,484 INFO L225 Difference]: With dead ends: 72 [2020-11-09 13:30:11,484 INFO L226 Difference]: Without dead ends: 66 [2020-11-09 13:30:11,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:30:11,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-09 13:30:11,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-11-09 13:30:11,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-09 13:30:11,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-11-09 13:30:11,488 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-11-09 13:30:11,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:11,488 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-11-09 13:30:11,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 13:30:11,488 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-11-09 13:30:11,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 13:30:11,488 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:11,489 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:11,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-09 13:30:11,699 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:11,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:11,700 INFO L82 PathProgramCache]: Analyzing trace with hash -260077303, now seen corresponding path program 17 times [2020-11-09 13:30:11,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:11,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124764879] [2020-11-09 13:30:11,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:11,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124764879] [2020-11-09 13:30:11,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071118165] [2020-11-09 13:30:11,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:11,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-09 13:30:11,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:11,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 13:30:11,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:11,894 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:11,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:11,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-09 13:30:11,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41188801] [2020-11-09 13:30:11,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 13:30:11,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:11,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 13:30:11,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-09 13:30:11,924 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 13 states. [2020-11-09 13:30:12,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:12,348 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-11-09 13:30:12,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-09 13:30:12,348 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-09 13:30:12,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:12,349 INFO L225 Difference]: With dead ends: 83 [2020-11-09 13:30:12,350 INFO L226 Difference]: Without dead ends: 78 [2020-11-09 13:30:12,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-11-09 13:30:12,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-09 13:30:12,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2020-11-09 13:30:12,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 13:30:12,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-11-09 13:30:12,354 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 16 [2020-11-09 13:30:12,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:12,354 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-11-09 13:30:12,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 13:30:12,354 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-11-09 13:30:12,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 13:30:12,355 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:12,355 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:12,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:12,567 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:12,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:12,567 INFO L82 PathProgramCache]: Analyzing trace with hash -518171259, now seen corresponding path program 18 times [2020-11-09 13:30:12,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:12,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29825055] [2020-11-09 13:30:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:12,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29825055] [2020-11-09 13:30:12,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808870860] [2020-11-09 13:30:12,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:12,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-09 13:30:12,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:12,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 13:30:12,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:12,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:12,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-09 13:30:12,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053289854] [2020-11-09 13:30:12,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 13:30:12,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:12,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 13:30:12,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-09 13:30:12,758 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 13 states. [2020-11-09 13:30:13,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:13,182 INFO L93 Difference]: Finished difference Result 91 states and 215 transitions. [2020-11-09 13:30:13,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 13:30:13,183 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-09 13:30:13,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:13,184 INFO L225 Difference]: With dead ends: 91 [2020-11-09 13:30:13,184 INFO L226 Difference]: Without dead ends: 82 [2020-11-09 13:30:13,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-11-09 13:30:13,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-09 13:30:13,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2020-11-09 13:30:13,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-09 13:30:13,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-11-09 13:30:13,192 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 16 [2020-11-09 13:30:13,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:13,193 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-11-09 13:30:13,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 13:30:13,193 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-11-09 13:30:13,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-09 13:30:13,196 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:13,196 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:13,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:13,408 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:13,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:13,409 INFO L82 PathProgramCache]: Analyzing trace with hash 527563414, now seen corresponding path program 19 times [2020-11-09 13:30:13,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:13,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106075003] [2020-11-09 13:30:13,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:13,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106075003] [2020-11-09 13:30:13,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776804349] [2020-11-09 13:30:13,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:13,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 13:30:13,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:13,592 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:13,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:13,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-09 13:30:13,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033382199] [2020-11-09 13:30:13,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 13:30:13,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:13,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 13:30:13,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-11-09 13:30:13,606 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-11-09 13:30:14,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:14,138 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-11-09 13:30:14,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 13:30:14,142 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-09 13:30:14,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:14,143 INFO L225 Difference]: With dead ends: 92 [2020-11-09 13:30:14,143 INFO L226 Difference]: Without dead ends: 83 [2020-11-09 13:30:14,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 13:30:14,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-09 13:30:14,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-11-09 13:30:14,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 13:30:14,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-11-09 13:30:14,149 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 17 [2020-11-09 13:30:14,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:14,151 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-11-09 13:30:14,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 13:30:14,151 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-11-09 13:30:14,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-09 13:30:14,151 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:14,151 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:14,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:14,352 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:14,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:14,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1116588253, now seen corresponding path program 20 times [2020-11-09 13:30:14,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:14,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079558337] [2020-11-09 13:30:14,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:14,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079558337] [2020-11-09 13:30:14,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39613378] [2020-11-09 13:30:14,483 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 [2020-11-09 13:30:14,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:14,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:14,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 13:30:14,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:14,572 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:14,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:14,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-09 13:30:14,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225837025] [2020-11-09 13:30:14,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 13:30:14,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:14,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 13:30:14,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-09 13:30:14,588 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 14 states. [2020-11-09 13:30:15,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:15,037 INFO L93 Difference]: Finished difference Result 80 states and 193 transitions. [2020-11-09 13:30:15,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-09 13:30:15,037 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-09 13:30:15,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:15,038 INFO L225 Difference]: With dead ends: 80 [2020-11-09 13:30:15,038 INFO L226 Difference]: Without dead ends: 75 [2020-11-09 13:30:15,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-11-09 13:30:15,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-09 13:30:15,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-11-09 13:30:15,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-09 13:30:15,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-11-09 13:30:15,044 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-11-09 13:30:15,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:15,044 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-11-09 13:30:15,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 13:30:15,044 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-11-09 13:30:15,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 13:30:15,045 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:15,045 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:15,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-09 13:30:15,246 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:15,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:15,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1069116582, now seen corresponding path program 21 times [2020-11-09 13:30:15,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:15,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700431457] [2020-11-09 13:30:15,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:15,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:15,414 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:15,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700431457] [2020-11-09 13:30:15,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683540590] [2020-11-09 13:30:15,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:15,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-09 13:30:15,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:15,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 13:30:15,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:15,474 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:15,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:15,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-09 13:30:15,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016087684] [2020-11-09 13:30:15,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 13:30:15,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:15,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 13:30:15,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-11-09 13:30:15,491 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-11-09 13:30:15,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:15,743 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-11-09 13:30:15,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 13:30:15,744 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-11-09 13:30:15,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:15,745 INFO L225 Difference]: With dead ends: 80 [2020-11-09 13:30:15,745 INFO L226 Difference]: Without dead ends: 74 [2020-11-09 13:30:15,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-11-09 13:30:15,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-09 13:30:15,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-11-09 13:30:15,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-09 13:30:15,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-11-09 13:30:15,750 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-11-09 13:30:15,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:15,751 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-11-09 13:30:15,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 13:30:15,751 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-11-09 13:30:15,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 13:30:15,751 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:15,751 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:15,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-09 13:30:15,962 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:15,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:15,962 INFO L82 PathProgramCache]: Analyzing trace with hash -825375252, now seen corresponding path program 22 times [2020-11-09 13:30:15,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:15,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877497166] [2020-11-09 13:30:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:16,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877497166] [2020-11-09 13:30:16,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920066291] [2020-11-09 13:30:16,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:16,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:16,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:16,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-09 13:30:16,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:16,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:16,195 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:16,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:16,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-09 13:30:16,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83455710] [2020-11-09 13:30:16,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 13:30:16,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:16,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 13:30:16,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-09 13:30:16,197 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 15 states. [2020-11-09 13:30:16,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:16,747 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-11-09 13:30:16,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-09 13:30:16,748 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-09 13:30:16,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:16,750 INFO L225 Difference]: With dead ends: 93 [2020-11-09 13:30:16,750 INFO L226 Difference]: Without dead ends: 88 [2020-11-09 13:30:16,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 13:30:16,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-09 13:30:16,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 53. [2020-11-09 13:30:16,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 13:30:16,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-11-09 13:30:16,754 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 18 [2020-11-09 13:30:16,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:16,755 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-11-09 13:30:16,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 13:30:16,755 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-11-09 13:30:16,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 13:30:16,755 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:16,756 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:16,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-09 13:30:16,960 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:16,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:16,960 INFO L82 PathProgramCache]: Analyzing trace with hash 254522690, now seen corresponding path program 23 times [2020-11-09 13:30:16,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:16,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531925628] [2020-11-09 13:30:16,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:17,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:17,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531925628] [2020-11-09 13:30:17,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139151989] [2020-11-09 13:30:17,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:17,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-09 13:30:17,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:17,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-09 13:30:17,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:17,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:17,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:17,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-09 13:30:17,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348185083] [2020-11-09 13:30:17,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 13:30:17,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:17,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 13:30:17,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-09 13:30:17,181 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 15 states. [2020-11-09 13:30:17,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:17,773 INFO L93 Difference]: Finished difference Result 101 states and 239 transitions. [2020-11-09 13:30:17,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-09 13:30:17,773 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-09 13:30:17,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:17,775 INFO L225 Difference]: With dead ends: 101 [2020-11-09 13:30:17,775 INFO L226 Difference]: Without dead ends: 92 [2020-11-09 13:30:17,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 13:30:17,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-11-09 13:30:17,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-11-09 13:30:17,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-09 13:30:17,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-11-09 13:30:17,780 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 18 [2020-11-09 13:30:17,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:17,780 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-11-09 13:30:17,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 13:30:17,780 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-11-09 13:30:17,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-09 13:30:17,781 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:17,781 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:17,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-09 13:30:17,992 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:17,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:17,992 INFO L82 PathProgramCache]: Analyzing trace with hash 183196179, now seen corresponding path program 24 times [2020-11-09 13:30:17,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:17,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251766652] [2020-11-09 13:30:17,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:18,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251766652] [2020-11-09 13:30:18,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188721907] [2020-11-09 13:30:18,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:18,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-09 13:30:18,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:18,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-09 13:30:18,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:18,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:18,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-09 13:30:18,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594865755] [2020-11-09 13:30:18,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-09 13:30:18,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:18,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-09 13:30:18,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-11-09 13:30:18,232 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-11-09 13:30:18,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:18,875 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-11-09 13:30:18,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-09 13:30:18,876 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-11-09 13:30:18,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:18,876 INFO L225 Difference]: With dead ends: 102 [2020-11-09 13:30:18,877 INFO L226 Difference]: Without dead ends: 93 [2020-11-09 13:30:18,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 13:30:18,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-09 13:30:18,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2020-11-09 13:30:18,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 13:30:18,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-11-09 13:30:18,880 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 19 [2020-11-09 13:30:18,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:18,881 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-11-09 13:30:18,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-09 13:30:18,881 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-11-09 13:30:18,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-09 13:30:18,881 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:18,881 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:19,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-09 13:30:19,084 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:19,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:19,085 INFO L82 PathProgramCache]: Analyzing trace with hash -699703104, now seen corresponding path program 25 times [2020-11-09 13:30:19,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:19,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989142130] [2020-11-09 13:30:19,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:19,216 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:19,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989142130] [2020-11-09 13:30:19,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932834226] [2020-11-09 13:30:19,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:19,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 13:30:19,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:19,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:19,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:19,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-09 13:30:19,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451319726] [2020-11-09 13:30:19,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-09 13:30:19,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:19,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-09 13:30:19,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-11-09 13:30:19,308 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 16 states. [2020-11-09 13:30:19,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:19,893 INFO L93 Difference]: Finished difference Result 88 states and 213 transitions. [2020-11-09 13:30:19,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-09 13:30:19,894 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-11-09 13:30:19,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:19,894 INFO L225 Difference]: With dead ends: 88 [2020-11-09 13:30:19,894 INFO L226 Difference]: Without dead ends: 83 [2020-11-09 13:30:19,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 13:30:19,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-09 13:30:19,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-11-09 13:30:19,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-09 13:30:19,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-11-09 13:30:19,897 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-11-09 13:30:19,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:19,897 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-11-09 13:30:19,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-09 13:30:19,897 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-11-09 13:30:19,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 13:30:19,898 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:19,898 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:20,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:20,100 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:20,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:20,100 INFO L82 PathProgramCache]: Analyzing trace with hash -923845315, now seen corresponding path program 26 times [2020-11-09 13:30:20,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:20,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557434105] [2020-11-09 13:30:20,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:20,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557434105] [2020-11-09 13:30:20,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539415003] [2020-11-09 13:30:20,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:20,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:20,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:20,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 13:30:20,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:20,361 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:20,376 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:20,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:20,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-09 13:30:20,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388256972] [2020-11-09 13:30:20,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-09 13:30:20,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:20,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-09 13:30:20,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-11-09 13:30:20,378 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-11-09 13:30:20,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:20,711 INFO L93 Difference]: Finished difference Result 88 states and 211 transitions. [2020-11-09 13:30:20,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-09 13:30:20,712 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-11-09 13:30:20,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:20,713 INFO L225 Difference]: With dead ends: 88 [2020-11-09 13:30:20,713 INFO L226 Difference]: Without dead ends: 82 [2020-11-09 13:30:20,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2020-11-09 13:30:20,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-09 13:30:20,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2020-11-09 13:30:20,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-09 13:30:20,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-11-09 13:30:20,717 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 20 [2020-11-09 13:30:20,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:20,717 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-11-09 13:30:20,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-09 13:30:20,717 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-11-09 13:30:20,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 13:30:20,717 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:20,717 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:20,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-09 13:30:20,928 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:20,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:20,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1384142351, now seen corresponding path program 27 times [2020-11-09 13:30:20,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:20,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972547392] [2020-11-09 13:30:20,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:21,058 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:21,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972547392] [2020-11-09 13:30:21,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767063746] [2020-11-09 13:30:21,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:21,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-09 13:30:21,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:21,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-09 13:30:21,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:21,150 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:21,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:21,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-09 13:30:21,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628220046] [2020-11-09 13:30:21,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 13:30:21,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:21,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 13:30:21,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-09 13:30:21,170 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 17 states. [2020-11-09 13:30:21,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:21,854 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-11-09 13:30:21,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-09 13:30:21,854 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-11-09 13:30:21,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:21,855 INFO L225 Difference]: With dead ends: 103 [2020-11-09 13:30:21,855 INFO L226 Difference]: Without dead ends: 98 [2020-11-09 13:30:21,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 13:30:21,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-09 13:30:21,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 57. [2020-11-09 13:30:21,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-09 13:30:21,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-11-09 13:30:21,860 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 20 [2020-11-09 13:30:21,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:21,861 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-11-09 13:30:21,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 13:30:21,861 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-11-09 13:30:21,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 13:30:21,862 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:21,862 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:22,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-09 13:30:22,073 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:22,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:22,073 INFO L82 PathProgramCache]: Analyzing trace with hash -215934529, now seen corresponding path program 28 times [2020-11-09 13:30:22,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:22,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348796430] [2020-11-09 13:30:22,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:22,205 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:22,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348796430] [2020-11-09 13:30:22,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814324105] [2020-11-09 13:30:22,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:22,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:22,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:22,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-09 13:30:22,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:22,299 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:22,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:22,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-09 13:30:22,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778983214] [2020-11-09 13:30:22,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 13:30:22,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:22,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 13:30:22,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-11-09 13:30:22,315 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 17 states. [2020-11-09 13:30:23,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:23,064 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-11-09 13:30:23,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-09 13:30:23,065 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-11-09 13:30:23,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:23,066 INFO L225 Difference]: With dead ends: 111 [2020-11-09 13:30:23,067 INFO L226 Difference]: Without dead ends: 102 [2020-11-09 13:30:23,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 13:30:23,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-09 13:30:23,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2020-11-09 13:30:23,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-09 13:30:23,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-11-09 13:30:23,070 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 20 [2020-11-09 13:30:23,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:23,071 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-11-09 13:30:23,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 13:30:23,071 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-11-09 13:30:23,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-09 13:30:23,071 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:23,072 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:23,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:23,283 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:23,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:23,283 INFO L82 PathProgramCache]: Analyzing trace with hash -41234864, now seen corresponding path program 29 times [2020-11-09 13:30:23,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:23,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855124986] [2020-11-09 13:30:23,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:23,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855124986] [2020-11-09 13:30:23,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800075130] [2020-11-09 13:30:23,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:23,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-09 13:30:23,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:23,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 13:30:23,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:23,542 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:23,557 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:23,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:23,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-09 13:30:23,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281783224] [2020-11-09 13:30:23,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 13:30:23,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:23,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 13:30:23,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:30:23,559 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-11-09 13:30:24,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:24,295 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-11-09 13:30:24,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 13:30:24,296 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-11-09 13:30:24,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:24,297 INFO L225 Difference]: With dead ends: 112 [2020-11-09 13:30:24,297 INFO L226 Difference]: Without dead ends: 103 [2020-11-09 13:30:24,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-11-09 13:30:24,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-09 13:30:24,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 57. [2020-11-09 13:30:24,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-09 13:30:24,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-11-09 13:30:24,302 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 21 [2020-11-09 13:30:24,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:24,302 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-11-09 13:30:24,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 13:30:24,303 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-11-09 13:30:24,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-09 13:30:24,303 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:24,303 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:24,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:24,504 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:24,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:24,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1895992291, now seen corresponding path program 30 times [2020-11-09 13:30:24,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:24,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573747872] [2020-11-09 13:30:24,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:24,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573747872] [2020-11-09 13:30:24,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965570857] [2020-11-09 13:30:24,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:24,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-09 13:30:24,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:24,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 13:30:24,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:24,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:24,778 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:24,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:24,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-09 13:30:24,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513736806] [2020-11-09 13:30:24,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 13:30:24,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:24,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 13:30:24,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:30:24,780 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 18 states. [2020-11-09 13:30:25,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:25,556 INFO L93 Difference]: Finished difference Result 96 states and 233 transitions. [2020-11-09 13:30:25,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-09 13:30:25,557 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-11-09 13:30:25,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:25,558 INFO L225 Difference]: With dead ends: 96 [2020-11-09 13:30:25,558 INFO L226 Difference]: Without dead ends: 91 [2020-11-09 13:30:25,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 13:30:25,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-11-09 13:30:25,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-11-09 13:30:25,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-09 13:30:25,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-11-09 13:30:25,563 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-11-09 13:30:25,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:25,563 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-11-09 13:30:25,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 13:30:25,563 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-11-09 13:30:25,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 13:30:25,563 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:25,564 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:25,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-11-09 13:30:25,764 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:25,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:25,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1242888800, now seen corresponding path program 31 times [2020-11-09 13:30:25,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:25,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920844819] [2020-11-09 13:30:25,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:25,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920844819] [2020-11-09 13:30:25,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344137215] [2020-11-09 13:30:25,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:26,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:26,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 13:30:26,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:26,034 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:26,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:26,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-11-09 13:30:26,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461529461] [2020-11-09 13:30:26,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 13:30:26,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:26,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 13:30:26,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:30:26,057 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-11-09 13:30:26,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:26,439 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-11-09 13:30:26,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 13:30:26,439 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-11-09 13:30:26,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:26,440 INFO L225 Difference]: With dead ends: 96 [2020-11-09 13:30:26,440 INFO L226 Difference]: Without dead ends: 90 [2020-11-09 13:30:26,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=704, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 13:30:26,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-09 13:30:26,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2020-11-09 13:30:26,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-09 13:30:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-11-09 13:30:26,445 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 22 [2020-11-09 13:30:26,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:26,446 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-11-09 13:30:26,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 13:30:26,446 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-11-09 13:30:26,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 13:30:26,446 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:26,446 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:26,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:26,657 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:26,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:26,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1278252686, now seen corresponding path program 32 times [2020-11-09 13:30:26,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:26,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446099026] [2020-11-09 13:30:26,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:26,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:26,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446099026] [2020-11-09 13:30:26,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364586275] [2020-11-09 13:30:26,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:26,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:26,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:26,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-09 13:30:26,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:26,926 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:26,942 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:26,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:26,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-09 13:30:26,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575443580] [2020-11-09 13:30:26,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-09 13:30:26,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:26,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-09 13:30:26,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-11-09 13:30:26,944 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 19 states. [2020-11-09 13:30:27,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:27,754 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-11-09 13:30:27,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-09 13:30:27,755 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-11-09 13:30:27,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:27,757 INFO L225 Difference]: With dead ends: 113 [2020-11-09 13:30:27,757 INFO L226 Difference]: Without dead ends: 108 [2020-11-09 13:30:27,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-11-09 13:30:27,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-09 13:30:27,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 61. [2020-11-09 13:30:27,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-09 13:30:27,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-11-09 13:30:27,762 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 22 [2020-11-09 13:30:27,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:27,762 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-11-09 13:30:27,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-09 13:30:27,762 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-11-09 13:30:27,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 13:30:27,763 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:27,763 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:27,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-09 13:30:27,974 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:27,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:27,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1353755908, now seen corresponding path program 33 times [2020-11-09 13:30:27,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:27,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539196495] [2020-11-09 13:30:27,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:28,161 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:28,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539196495] [2020-11-09 13:30:28,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726044988] [2020-11-09 13:30:28,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:28,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-09 13:30:28,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:28,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 13:30:28,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:28,325 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:28,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:28,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-09 13:30:28,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723547289] [2020-11-09 13:30:28,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-09 13:30:28,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:28,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-09 13:30:28,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-11-09 13:30:28,328 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 19 states. [2020-11-09 13:30:29,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:29,148 INFO L93 Difference]: Finished difference Result 121 states and 287 transitions. [2020-11-09 13:30:29,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 13:30:29,149 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-11-09 13:30:29,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:29,150 INFO L225 Difference]: With dead ends: 121 [2020-11-09 13:30:29,150 INFO L226 Difference]: Without dead ends: 112 [2020-11-09 13:30:29,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=587, Invalid=1483, Unknown=0, NotChecked=0, Total=2070 [2020-11-09 13:30:29,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-09 13:30:29,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 77. [2020-11-09 13:30:29,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-09 13:30:29,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-11-09 13:30:29,155 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 22 [2020-11-09 13:30:29,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:29,155 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-11-09 13:30:29,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-09 13:30:29,155 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-11-09 13:30:29,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-09 13:30:29,155 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:29,156 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:29,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:29,367 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:29,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:29,367 INFO L82 PathProgramCache]: Analyzing trace with hash -971102387, now seen corresponding path program 34 times [2020-11-09 13:30:29,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:29,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453133119] [2020-11-09 13:30:29,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:29,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453133119] [2020-11-09 13:30:29,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88701353] [2020-11-09 13:30:29,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:29,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:29,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:29,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 13:30:29,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:29,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:29,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:29,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-09 13:30:29,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537068621] [2020-11-09 13:30:29,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 13:30:29,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:29,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 13:30:29,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-11-09 13:30:29,658 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-11-09 13:30:30,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:30,597 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-11-09 13:30:30,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-09 13:30:30,598 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-11-09 13:30:30,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:30,599 INFO L225 Difference]: With dead ends: 122 [2020-11-09 13:30:30,599 INFO L226 Difference]: Without dead ends: 113 [2020-11-09 13:30:30,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-11-09 13:30:30,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-11-09 13:30:30,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 61. [2020-11-09 13:30:30,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-09 13:30:30,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-11-09 13:30:30,604 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 23 [2020-11-09 13:30:30,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:30,605 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-11-09 13:30:30,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 13:30:30,605 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-11-09 13:30:30,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-09 13:30:30,605 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:30,605 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:30,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-09 13:30:30,816 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:30,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:30,816 INFO L82 PathProgramCache]: Analyzing trace with hash 983267910, now seen corresponding path program 35 times [2020-11-09 13:30:30,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:30,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079091917] [2020-11-09 13:30:30,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:31,001 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:31,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079091917] [2020-11-09 13:30:31,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998028141] [2020-11-09 13:30:31,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:31,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-09 13:30:31,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:31,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 13:30:31,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:31,094 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:31,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:31,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-09 13:30:31,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27596257] [2020-11-09 13:30:31,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 13:30:31,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:31,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 13:30:31,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-11-09 13:30:31,123 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 20 states. [2020-11-09 13:30:32,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:32,057 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-11-09 13:30:32,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-09 13:30:32,058 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-11-09 13:30:32,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:32,059 INFO L225 Difference]: With dead ends: 104 [2020-11-09 13:30:32,059 INFO L226 Difference]: Without dead ends: 99 [2020-11-09 13:30:32,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-11-09 13:30:32,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-09 13:30:32,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2020-11-09 13:30:32,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-09 13:30:32,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-11-09 13:30:32,065 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-11-09 13:30:32,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:32,065 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-11-09 13:30:32,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 13:30:32,065 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-11-09 13:30:32,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 13:30:32,066 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:32,066 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:32,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-09 13:30:32,277 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:32,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:32,278 INFO L82 PathProgramCache]: Analyzing trace with hash 415234755, now seen corresponding path program 36 times [2020-11-09 13:30:32,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:32,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184208376] [2020-11-09 13:30:32,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:32,546 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:32,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184208376] [2020-11-09 13:30:32,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964873393] [2020-11-09 13:30:32,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:32,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-09 13:30:32,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:32,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 13:30:32,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:32,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:32,645 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:32,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:32,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-11-09 13:30:32,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006146282] [2020-11-09 13:30:32,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 13:30:32,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:32,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 13:30:32,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-11-09 13:30:32,647 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-11-09 13:30:33,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:33,107 INFO L93 Difference]: Finished difference Result 104 states and 251 transitions. [2020-11-09 13:30:33,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-09 13:30:33,108 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-11-09 13:30:33,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:33,109 INFO L225 Difference]: With dead ends: 104 [2020-11-09 13:30:33,110 INFO L226 Difference]: Without dead ends: 98 [2020-11-09 13:30:33,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 13:30:33,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-09 13:30:33,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-11-09 13:30:33,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-09 13:30:33,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-11-09 13:30:33,113 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 24 [2020-11-09 13:30:33,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:33,113 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-11-09 13:30:33,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 13:30:33,115 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-11-09 13:30:33,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 13:30:33,115 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:33,115 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:33,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-09 13:30:33,325 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:33,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:33,325 INFO L82 PathProgramCache]: Analyzing trace with hash -39374827, now seen corresponding path program 37 times [2020-11-09 13:30:33,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:33,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543039683] [2020-11-09 13:30:33,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:33,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543039683] [2020-11-09 13:30:33,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864043475] [2020-11-09 13:30:33,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:33,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-09 13:30:33,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:33,624 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:33,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:33,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-09 13:30:33,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496519470] [2020-11-09 13:30:33,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 13:30:33,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:33,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 13:30:33,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:30:33,645 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 21 states. [2020-11-09 13:30:34,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:34,670 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-11-09 13:30:34,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-09 13:30:34,670 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-09 13:30:34,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:34,671 INFO L225 Difference]: With dead ends: 123 [2020-11-09 13:30:34,672 INFO L226 Difference]: Without dead ends: 118 [2020-11-09 13:30:34,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-11-09 13:30:34,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-11-09 13:30:34,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 65. [2020-11-09 13:30:34,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-09 13:30:34,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-11-09 13:30:34,676 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 24 [2020-11-09 13:30:34,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:34,676 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-11-09 13:30:34,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 13:30:34,676 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-11-09 13:30:34,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 13:30:34,677 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:34,677 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:34,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-09 13:30:34,878 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:34,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:34,878 INFO L82 PathProgramCache]: Analyzing trace with hash 416559353, now seen corresponding path program 38 times [2020-11-09 13:30:34,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:34,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940009211] [2020-11-09 13:30:34,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:35,079 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:35,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940009211] [2020-11-09 13:30:35,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488878244] [2020-11-09 13:30:35,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:35,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:35,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:35,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-09 13:30:35,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:35,161 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:35,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:35,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-09 13:30:35,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251169847] [2020-11-09 13:30:35,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 13:30:35,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:35,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 13:30:35,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:30:35,180 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 21 states. [2020-11-09 13:30:36,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:36,235 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-11-09 13:30:36,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-09 13:30:36,236 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-09 13:30:36,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:36,237 INFO L225 Difference]: With dead ends: 131 [2020-11-09 13:30:36,238 INFO L226 Difference]: Without dead ends: 122 [2020-11-09 13:30:36,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-11-09 13:30:36,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-11-09 13:30:36,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 83. [2020-11-09 13:30:36,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-09 13:30:36,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-11-09 13:30:36,243 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 24 [2020-11-09 13:30:36,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:36,243 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-11-09 13:30:36,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 13:30:36,243 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-11-09 13:30:36,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-09 13:30:36,244 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:36,244 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:36,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-09 13:30:36,455 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:36,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:36,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1220594422, now seen corresponding path program 39 times [2020-11-09 13:30:36,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:36,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857058723] [2020-11-09 13:30:36,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:36,646 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:36,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857058723] [2020-11-09 13:30:36,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238671309] [2020-11-09 13:30:36,646 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 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 [2020-11-09 13:30:36,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-09 13:30:36,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:36,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 13:30:36,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:36,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:36,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:36,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-09 13:30:36,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745714013] [2020-11-09 13:30:36,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-09 13:30:36,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:36,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-09 13:30:36,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-11-09 13:30:36,803 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-11-09 13:30:37,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:37,874 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-11-09 13:30:37,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-09 13:30:37,878 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-11-09 13:30:37,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:37,879 INFO L225 Difference]: With dead ends: 132 [2020-11-09 13:30:37,879 INFO L226 Difference]: Without dead ends: 123 [2020-11-09 13:30:37,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-11-09 13:30:37,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-09 13:30:37,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 65. [2020-11-09 13:30:37,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-09 13:30:37,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-11-09 13:30:37,884 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 25 [2020-11-09 13:30:37,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:37,884 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-11-09 13:30:37,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-09 13:30:37,884 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-11-09 13:30:37,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-09 13:30:37,885 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:37,885 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:38,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-11-09 13:30:38,091 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:38,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:38,091 INFO L82 PathProgramCache]: Analyzing trace with hash 28466153, now seen corresponding path program 40 times [2020-11-09 13:30:38,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:38,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398096234] [2020-11-09 13:30:38,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:38,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:38,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398096234] [2020-11-09 13:30:38,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504422322] [2020-11-09 13:30:38,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:38,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:38,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:38,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 13:30:38,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:38,355 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:38,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:38,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-09 13:30:38,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691156687] [2020-11-09 13:30:38,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-09 13:30:38,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:38,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-09 13:30:38,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-11-09 13:30:38,374 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 22 states. [2020-11-09 13:30:39,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:39,490 INFO L93 Difference]: Finished difference Result 112 states and 273 transitions. [2020-11-09 13:30:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-09 13:30:39,491 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-11-09 13:30:39,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:39,492 INFO L225 Difference]: With dead ends: 112 [2020-11-09 13:30:39,492 INFO L226 Difference]: Without dead ends: 107 [2020-11-09 13:30:39,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-11-09 13:30:39,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-09 13:30:39,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-11-09 13:30:39,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-09 13:30:39,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-11-09 13:30:39,496 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-11-09 13:30:39,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:39,496 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-11-09 13:30:39,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-09 13:30:39,497 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-11-09 13:30:39,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 13:30:39,497 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:39,497 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:39,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-09 13:30:39,708 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:39,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:39,708 INFO L82 PathProgramCache]: Analyzing trace with hash -391352730, now seen corresponding path program 41 times [2020-11-09 13:30:39,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:39,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288171686] [2020-11-09 13:30:39,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:39,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288171686] [2020-11-09 13:30:39,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635962245] [2020-11-09 13:30:39,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:40,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-09 13:30:40,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:40,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 13:30:40,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:40,063 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:40,077 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:40,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:40,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-11-09 13:30:40,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243994862] [2020-11-09 13:30:40,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-09 13:30:40,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:40,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-09 13:30:40,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-11-09 13:30:40,079 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-11-09 13:30:40,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:40,601 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-11-09 13:30:40,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 13:30:40,602 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-11-09 13:30:40,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:40,603 INFO L225 Difference]: With dead ends: 112 [2020-11-09 13:30:40,604 INFO L226 Difference]: Without dead ends: 106 [2020-11-09 13:30:40,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=540, Invalid=1100, Unknown=0, NotChecked=0, Total=1640 [2020-11-09 13:30:40,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-09 13:30:40,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2020-11-09 13:30:40,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-09 13:30:40,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-11-09 13:30:40,609 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 26 [2020-11-09 13:30:40,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:40,611 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-11-09 13:30:40,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-09 13:30:40,611 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-11-09 13:30:40,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 13:30:40,612 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:40,612 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:40,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:40,820 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:40,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:40,820 INFO L82 PathProgramCache]: Analyzing trace with hash 816306680, now seen corresponding path program 42 times [2020-11-09 13:30:40,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:40,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210438204] [2020-11-09 13:30:40,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:40,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:41,047 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:41,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210438204] [2020-11-09 13:30:41,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922350881] [2020-11-09 13:30:41,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:41,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-09 13:30:41,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:41,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-09 13:30:41,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:41,153 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:41,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:41,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-09 13:30:41,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958116068] [2020-11-09 13:30:41,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 13:30:41,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:41,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 13:30:41,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-11-09 13:30:41,176 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 23 states. [2020-11-09 13:30:42,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:42,350 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-11-09 13:30:42,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-09 13:30:42,350 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-11-09 13:30:42,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:42,351 INFO L225 Difference]: With dead ends: 133 [2020-11-09 13:30:42,351 INFO L226 Difference]: Without dead ends: 128 [2020-11-09 13:30:42,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-11-09 13:30:42,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-11-09 13:30:42,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 69. [2020-11-09 13:30:42,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-09 13:30:42,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-11-09 13:30:42,356 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 26 [2020-11-09 13:30:42,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:42,356 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-11-09 13:30:42,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 13:30:42,357 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-11-09 13:30:42,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 13:30:42,357 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:42,357 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:42,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-11-09 13:30:42,567 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:42,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:42,568 INFO L82 PathProgramCache]: Analyzing trace with hash 882475958, now seen corresponding path program 43 times [2020-11-09 13:30:42,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:42,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8471826] [2020-11-09 13:30:42,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:42,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8471826] [2020-11-09 13:30:42,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430048933] [2020-11-09 13:30:42,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:42,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-09 13:30:42,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:42,894 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:42,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:42,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-09 13:30:42,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494913274] [2020-11-09 13:30:42,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 13:30:42,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:42,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 13:30:42,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-11-09 13:30:42,913 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 23 states. [2020-11-09 13:30:44,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:44,147 INFO L93 Difference]: Finished difference Result 141 states and 335 transitions. [2020-11-09 13:30:44,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-09 13:30:44,148 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-11-09 13:30:44,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:44,149 INFO L225 Difference]: With dead ends: 141 [2020-11-09 13:30:44,149 INFO L226 Difference]: Without dead ends: 132 [2020-11-09 13:30:44,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-11-09 13:30:44,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-11-09 13:30:44,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 89. [2020-11-09 13:30:44,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-09 13:30:44,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-11-09 13:30:44,154 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 26 [2020-11-09 13:30:44,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:44,155 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-11-09 13:30:44,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 13:30:44,155 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-11-09 13:30:44,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-09 13:30:44,155 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:44,155 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:44,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:44,366 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:44,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:44,366 INFO L82 PathProgramCache]: Analyzing trace with hash -464271481, now seen corresponding path program 44 times [2020-11-09 13:30:44,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:44,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336367665] [2020-11-09 13:30:44,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:44,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:44,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336367665] [2020-11-09 13:30:44,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509595931] [2020-11-09 13:30:44,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:44,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:44,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:44,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 13:30:44,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:44,697 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:44,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:44,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-09 13:30:44,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573927883] [2020-11-09 13:30:44,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-09 13:30:44,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:44,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-09 13:30:44,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-11-09 13:30:44,718 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-11-09 13:30:46,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:46,097 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-11-09 13:30:46,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-09 13:30:46,098 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-11-09 13:30:46,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:46,100 INFO L225 Difference]: With dead ends: 142 [2020-11-09 13:30:46,100 INFO L226 Difference]: Without dead ends: 133 [2020-11-09 13:30:46,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-11-09 13:30:46,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-11-09 13:30:46,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 69. [2020-11-09 13:30:46,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-09 13:30:46,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-11-09 13:30:46,104 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 27 [2020-11-09 13:30:46,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:46,104 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-11-09 13:30:46,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-09 13:30:46,104 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-11-09 13:30:46,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-09 13:30:46,105 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:46,105 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:46,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-11-09 13:30:46,314 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:46,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:46,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1586979020, now seen corresponding path program 45 times [2020-11-09 13:30:46,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:46,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56628364] [2020-11-09 13:30:46,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:46,569 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:46,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56628364] [2020-11-09 13:30:46,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090994875] [2020-11-09 13:30:46,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:46,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-09 13:30:46,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:46,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 13:30:46,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:46,670 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:46,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:46,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-09 13:30:46,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090132342] [2020-11-09 13:30:46,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-09 13:30:46,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:46,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-09 13:30:46,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-11-09 13:30:46,693 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 24 states. [2020-11-09 13:30:48,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:48,002 INFO L93 Difference]: Finished difference Result 120 states and 293 transitions. [2020-11-09 13:30:48,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-09 13:30:48,003 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-11-09 13:30:48,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:48,004 INFO L225 Difference]: With dead ends: 120 [2020-11-09 13:30:48,004 INFO L226 Difference]: Without dead ends: 115 [2020-11-09 13:30:48,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-11-09 13:30:48,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-11-09 13:30:48,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2020-11-09 13:30:48,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-09 13:30:48,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-11-09 13:30:48,009 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-11-09 13:30:48,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:48,009 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-11-09 13:30:48,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-09 13:30:48,010 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-11-09 13:30:48,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-09 13:30:48,010 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:48,010 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:48,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:48,220 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:48,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:48,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1867154761, now seen corresponding path program 46 times [2020-11-09 13:30:48,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:48,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308606092] [2020-11-09 13:30:48,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-09 13:30:48,235 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-09 13:30:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-09 13:30:48,250 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-09 13:30:48,277 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-09 13:30:48,278 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-09 13:30:48,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-11-09 13:30:48,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 01:30:48 BasicIcfg [2020-11-09 13:30:48,362 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-09 13:30:48,364 INFO L168 Benchmark]: Toolchain (without parser) took 52928.23 ms. Allocated memory was 153.1 MB in the beginning and 222.3 MB in the end (delta: 69.2 MB). Free memory was 126.9 MB in the beginning and 170.0 MB in the end (delta: -43.1 MB). Peak memory consumption was 26.9 MB. Max. memory is 8.0 GB. [2020-11-09 13:30:48,365 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory was 96.8 MB in the beginning and 96.6 MB in the end (delta: 120.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-09 13:30:48,365 INFO L168 Benchmark]: CACSL2BoogieTranslator took 822.43 ms. Allocated memory is still 153.1 MB. Free memory was 126.3 MB in the beginning and 121.9 MB in the end (delta: 4.4 MB). Peak memory consumption was 21.2 MB. Max. memory is 8.0 GB. [2020-11-09 13:30:48,366 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.10 ms. Allocated memory is still 153.1 MB. Free memory was 121.9 MB in the beginning and 120.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-09 13:30:48,366 INFO L168 Benchmark]: Boogie Preprocessor took 30.05 ms. Allocated memory is still 153.1 MB. Free memory was 120.2 MB in the beginning and 118.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-09 13:30:48,366 INFO L168 Benchmark]: RCFGBuilder took 617.89 ms. Allocated memory is still 153.1 MB. Free memory was 118.8 MB in the beginning and 99.2 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-11-09 13:30:48,367 INFO L168 Benchmark]: TraceAbstraction took 51397.50 ms. Allocated memory was 153.1 MB in the beginning and 222.3 MB in the end (delta: 69.2 MB). Free memory was 98.6 MB in the beginning and 170.0 MB in the end (delta: -71.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-09 13:30:48,370 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory was 96.8 MB in the beginning and 96.6 MB in the end (delta: 120.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 822.43 ms. Allocated memory is still 153.1 MB. Free memory was 126.3 MB in the beginning and 121.9 MB in the end (delta: 4.4 MB). Peak memory consumption was 21.2 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 45.10 ms. Allocated memory is still 153.1 MB. Free memory was 121.9 MB in the beginning and 120.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.05 ms. Allocated memory is still 153.1 MB. Free memory was 120.2 MB in the beginning and 118.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 617.89 ms. Allocated memory is still 153.1 MB. Free memory was 118.8 MB in the beginning and 99.2 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 51397.50 ms. Allocated memory was 153.1 MB in the beginning and 222.3 MB in the end (delta: 69.2 MB). Free memory was 98.6 MB in the beginning and 170.0 MB in the end (delta: -71.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 637 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 15 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 4.0s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 7 FixpointIterations, 16 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 62 TotalNumberOfCompositions, 1187 MoverChecksTotal - CounterExampleResult [Line: 685]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L686] 0 int i = 3, j = 6; [L704] 0 pthread_t id1, id2; [L705] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L706] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L708] 0 int condI = i >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L696] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L688] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=6, k=5] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=8, k=7] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=10, k=9] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L711] 0 int condJ = j >= (2*10 +6); [L713] COND TRUE 0 condI || condJ [L685] COND FALSE 0 !(0) [L685] 0 __assert_fail ("0", "triangular-longer-2.c", 8, __extension__ __PRETTY_FUNCTION__) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 51.1s, OverallIterations: 48, TraceHistogramMax: 10, AutomataDifference: 26.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.1s, HoareTripleCheckerStatistics: 738 SDtfs, 2970 SDslu, 3074 SDs, 0 SdLazy, 3686 SolverSat, 2454 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2186 GetRequests, 688 SyntacticMatches, 34 SemanticMatches, 1464 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14778 ImplicationChecksByTransitivity, 24.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 47 MinimizatonAttempts, 1162 StatesRemovedByMinimization, 46 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 8.0s InterpolantComputationTime, 1668 NumberOfCodeBlocks, 1668 NumberOfCodeBlocksAsserted, 204 NumberOfCheckSat, 1551 ConstructedInterpolants, 0 QuantifiedInterpolants, 122223 SizeOfPredicates, 470 NumberOfNonLiveVariables, 5586 ConjunctsInSsa, 641 ConjunctsInUnsatCore, 89 InterpolantComputations, 5 PerfectInterpolantSequences, 0/2580 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 proved your program to be incorrect! Received shutdown request...