/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7a177ad [2020-11-09 12:06:31,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-09 12:06:31,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-09 12:06:31,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-09 12:06:31,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-09 12:06:31,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-09 12:06:31,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-09 12:06:31,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-09 12:06:31,057 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-09 12:06:31,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-09 12:06:31,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-09 12:06:31,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-09 12:06:31,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-09 12:06:31,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-09 12:06:31,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-09 12:06:31,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-09 12:06:31,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-09 12:06:31,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-09 12:06:31,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-09 12:06:31,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-09 12:06:31,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-09 12:06:31,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-09 12:06:31,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-09 12:06:31,118 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-09 12:06:31,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-09 12:06:31,124 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-09 12:06:31,125 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-09 12:06:31,129 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-09 12:06:31,130 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-09 12:06:31,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-09 12:06:31,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-09 12:06:31,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-09 12:06:31,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-09 12:06:31,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-09 12:06:31,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-09 12:06:31,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-09 12:06:31,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-09 12:06:31,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-09 12:06:31,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-09 12:06:31,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-09 12:06:31,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-09 12:06:31,148 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-09 12:06:31,203 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-09 12:06:31,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-09 12:06:31,205 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-09 12:06:31,205 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-09 12:06:31,206 INFO L138 SettingsManager]: * Use SBE=true [2020-11-09 12:06:31,206 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-09 12:06:31,206 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-09 12:06:31,206 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-09 12:06:31,206 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-09 12:06:31,207 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-09 12:06:31,207 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-09 12:06:31,207 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-09 12:06:31,207 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-09 12:06:31,207 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-09 12:06:31,208 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-09 12:06:31,208 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-09 12:06:31,208 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-09 12:06:31,208 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-09 12:06:31,208 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-09 12:06:31,209 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-09 12:06:31,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-09 12:06:31,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-09 12:06:31,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-09 12:06:31,209 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-09 12:06:31,210 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-09 12:06:31,210 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-09 12:06:31,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-09 12:06:31,210 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-09 12:06:31,210 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-09 12:06:31,211 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-09 12:06:31,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-09 12:06:31,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-09 12:06:31,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-09 12:06:31,675 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-09 12:06:31,675 INFO L275 PluginConnector]: CDTParser initialized [2020-11-09 12:06:31,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-11-09 12:06:31,767 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ec4eca51/33c444cc06e74d64858697e66870047d/FLAGbfc4a3ac8 [2020-11-09 12:06:32,429 INFO L306 CDTParser]: Found 1 translation units. [2020-11-09 12:06:32,430 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-11-09 12:06:32,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ec4eca51/33c444cc06e74d64858697e66870047d/FLAGbfc4a3ac8 [2020-11-09 12:06:32,677 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ec4eca51/33c444cc06e74d64858697e66870047d [2020-11-09 12:06:32,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-09 12:06:32,687 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-09 12:06:32,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-09 12:06:32,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-09 12:06:32,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-09 12:06:32,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 12:06:32" (1/1) ... [2020-11-09 12:06:32,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5acd983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:06:32, skipping insertion in model container [2020-11-09 12:06:32,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 12:06:32" (1/1) ... [2020-11-09 12:06:32,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-09 12:06:32,754 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-09 12:06:33,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 12:06:33,273 INFO L203 MainTranslator]: Completed pre-run [2020-11-09 12:06:33,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 12:06:33,507 INFO L208 MainTranslator]: Completed translation [2020-11-09 12:06:33,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:06:33 WrapperNode [2020-11-09 12:06:33,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-09 12:06:33,508 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-09 12:06:33,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-09 12:06:33,509 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-09 12:06:33,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:06:33" (1/1) ... [2020-11-09 12:06:33,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:06:33" (1/1) ... [2020-11-09 12:06:33,562 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-09 12:06:33,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-09 12:06:33,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-09 12:06:33,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-09 12:06:33,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:06:33" (1/1) ... [2020-11-09 12:06:33,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:06:33" (1/1) ... [2020-11-09 12:06:33,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:06:33" (1/1) ... [2020-11-09 12:06:33,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:06:33" (1/1) ... [2020-11-09 12:06:33,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:06:33" (1/1) ... [2020-11-09 12:06:33,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:06:33" (1/1) ... [2020-11-09 12:06:33,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:06:33" (1/1) ... [2020-11-09 12:06:33,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-09 12:06:33,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-09 12:06:33,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-09 12:06:33,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-09 12:06:33,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:06:33" (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 12:06:33,671 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-09 12:06:33,671 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-09 12:06:33,672 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-09 12:06:33,672 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-09 12:06:33,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-09 12:06:33,673 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-09 12:06:33,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-09 12:06:33,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-09 12:06:33,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-09 12:06:33,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-09 12:06:33,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-09 12:06:33,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-09 12:06:33,679 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 12:06:34,104 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-09 12:06:34,104 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-09 12:06:34,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 12:06:34 BoogieIcfgContainer [2020-11-09 12:06:34,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-09 12:06:34,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-09 12:06:34,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-09 12:06:34,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-09 12:06:34,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 12:06:32" (1/3) ... [2020-11-09 12:06:34,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73deaa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 12:06:34, skipping insertion in model container [2020-11-09 12:06:34,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:06:33" (2/3) ... [2020-11-09 12:06:34,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73deaa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 12:06:34, skipping insertion in model container [2020-11-09 12:06:34,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 12:06:34" (3/3) ... [2020-11-09 12:06:34,117 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2020-11-09 12:06:34,135 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-09 12:06:34,136 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-09 12:06:34,140 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-09 12:06:34,141 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-09 12:06:34,174 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,174 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,174 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,174 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,175 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,175 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,175 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,175 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,176 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,176 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,176 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,176 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,177 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,177 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,177 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,177 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,177 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,178 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,178 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,178 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,178 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,179 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,179 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,179 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,179 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,179 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,180 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,180 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,180 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,181 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,181 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,181 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,181 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,181 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,181 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,182 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,182 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,182 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,182 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,183 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,183 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,183 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,183 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,183 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,184 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,184 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,184 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,184 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,184 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,185 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,185 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,185 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,185 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,185 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,186 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,186 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,188 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,188 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,189 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,189 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,189 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,189 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,198 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,198 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,199 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,199 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,199 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,199 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:06:34,202 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-09 12:06:34,214 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-09 12:06:34,239 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-09 12:06:34,239 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-09 12:06:34,239 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-09 12:06:34,239 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-09 12:06:34,240 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-09 12:06:34,240 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-09 12:06:34,240 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-09 12:06:34,240 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-09 12:06:34,253 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-09 12:06:34,256 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-09 12:06:34,259 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-09 12:06:34,261 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-11-09 12:06:34,304 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-11-09 12:06:34,305 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-09 12:06:34,310 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 12:06:34,313 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-11-09 12:06:36,135 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-09 12:06:36,300 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-09 12:06:37,107 WARN L194 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-11-09 12:06:37,449 WARN L194 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-11-09 12:06:37,566 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-09 12:06:38,071 WARN L194 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-11-09 12:06:38,219 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-09 12:06:38,548 WARN L194 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-11-09 12:06:38,716 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-09 12:06:38,803 INFO L131 LiptonReduction]: Checked pairs total: 1187 [2020-11-09 12:06:38,804 INFO L133 LiptonReduction]: Total number of compositions: 62 [2020-11-09 12:06:38,813 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-11-09 12:06:38,823 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-11-09 12:06:38,825 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-09 12:06:38,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-09 12:06:38,830 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:38,831 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-09 12:06:38,832 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:38,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:38,838 INFO L82 PathProgramCache]: Analyzing trace with hash -805875314, now seen corresponding path program 1 times [2020-11-09 12:06:38,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:38,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356223312] [2020-11-09 12:06:38,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:39,087 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 12:06:39,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356223312] [2020-11-09 12:06:39,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 12:06:39,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-09 12:06:39,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005303846] [2020-11-09 12:06:39,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-09 12:06:39,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:39,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-09 12:06:39,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-09 12:06:39,129 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-11-09 12:06:39,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:39,239 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-11-09 12:06:39,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-09 12:06:39,243 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-09 12:06:39,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:39,259 INFO L225 Difference]: With dead ends: 75 [2020-11-09 12:06:39,259 INFO L226 Difference]: Without dead ends: 42 [2020-11-09 12:06:39,263 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 12:06:39,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-09 12:06:39,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-09 12:06:39,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 12:06:39,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-11-09 12:06:39,321 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-11-09 12:06:39,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:39,322 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-11-09 12:06:39,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-09 12:06:39,322 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-11-09 12:06:39,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-09 12:06:39,325 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:39,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:39,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-09 12:06:39,327 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:39,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:39,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1351909113, now seen corresponding path program 1 times [2020-11-09 12:06:39,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:39,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261996187] [2020-11-09 12:06:39,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:39,428 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 12:06:39,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261996187] [2020-11-09 12:06:39,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 12:06:39,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-09 12:06:39,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550582970] [2020-11-09 12:06:39,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-09 12:06:39,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:39,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-09 12:06:39,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-09 12:06:39,433 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-11-09 12:06:39,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:39,470 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-11-09 12:06:39,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-09 12:06:39,470 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-09 12:06:39,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:39,472 INFO L225 Difference]: With dead ends: 56 [2020-11-09 12:06:39,472 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 12:06:39,473 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 12:06:39,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 12:06:39,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-09 12:06:39,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 12:06:39,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-11-09 12:06:39,481 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-11-09 12:06:39,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:39,482 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-11-09 12:06:39,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-09 12:06:39,483 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-11-09 12:06:39,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 12:06:39,484 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:39,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:39,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-09 12:06:39,485 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:39,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:39,486 INFO L82 PathProgramCache]: Analyzing trace with hash 2021583950, now seen corresponding path program 1 times [2020-11-09 12:06:39,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:39,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592564516] [2020-11-09 12:06:39,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:39,588 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 12:06:39,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592564516] [2020-11-09 12:06:39,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 12:06:39,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 12:06:39,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110752228] [2020-11-09 12:06:39,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-09 12:06:39,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:39,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-09 12:06:39,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-09 12:06:39,591 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-11-09 12:06:39,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:39,687 INFO L93 Difference]: Finished difference Result 54 states and 124 transitions. [2020-11-09 12:06:39,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 12:06:39,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-09 12:06:39,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:39,689 INFO L225 Difference]: With dead ends: 54 [2020-11-09 12:06:39,689 INFO L226 Difference]: Without dead ends: 47 [2020-11-09 12:06:39,690 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 12:06:39,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-09 12:06:39,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-11-09 12:06:39,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-09 12:06:39,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 106 transitions. [2020-11-09 12:06:39,699 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 106 transitions. Word has length 10 [2020-11-09 12:06:39,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:39,700 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 106 transitions. [2020-11-09 12:06:39,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-09 12:06:39,700 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 106 transitions. [2020-11-09 12:06:39,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 12:06:39,701 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:39,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:39,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-09 12:06:39,701 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:39,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:39,702 INFO L82 PathProgramCache]: Analyzing trace with hash 2101929440, now seen corresponding path program 2 times [2020-11-09 12:06:39,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:39,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463062282] [2020-11-09 12:06:39,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:39,830 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 12:06:39,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463062282] [2020-11-09 12:06:39,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 12:06:39,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 12:06:39,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290017301] [2020-11-09 12:06:39,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-09 12:06:39,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:39,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-09 12:06:39,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-09 12:06:39,835 INFO L87 Difference]: Start difference. First operand 45 states and 106 transitions. Second operand 6 states. [2020-11-09 12:06:39,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:39,945 INFO L93 Difference]: Finished difference Result 59 states and 138 transitions. [2020-11-09 12:06:39,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 12:06:39,952 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-09 12:06:39,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:39,954 INFO L225 Difference]: With dead ends: 59 [2020-11-09 12:06:39,954 INFO L226 Difference]: Without dead ends: 53 [2020-11-09 12:06:39,954 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 12:06:39,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-09 12:06:39,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2020-11-09 12:06:39,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 12:06:39,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 96 transitions. [2020-11-09 12:06:39,962 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 96 transitions. Word has length 10 [2020-11-09 12:06:39,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:39,962 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 96 transitions. [2020-11-09 12:06:39,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-09 12:06:39,962 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 96 transitions. [2020-11-09 12:06:39,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 12:06:39,963 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:39,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:39,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-09 12:06:39,964 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:39,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:39,964 INFO L82 PathProgramCache]: Analyzing trace with hash 2082353870, now seen corresponding path program 3 times [2020-11-09 12:06:39,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:39,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845979425] [2020-11-09 12:06:39,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:40,038 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 12:06:40,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845979425] [2020-11-09 12:06:40,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 12:06:40,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 12:06:40,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680931006] [2020-11-09 12:06:40,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-09 12:06:40,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:40,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-09 12:06:40,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-09 12:06:40,041 INFO L87 Difference]: Start difference. First operand 41 states and 96 transitions. Second operand 6 states. [2020-11-09 12:06:40,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:40,129 INFO L93 Difference]: Finished difference Result 65 states and 152 transitions. [2020-11-09 12:06:40,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 12:06:40,129 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-09 12:06:40,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:40,130 INFO L225 Difference]: With dead ends: 65 [2020-11-09 12:06:40,130 INFO L226 Difference]: Without dead ends: 52 [2020-11-09 12:06:40,131 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 12:06:40,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-09 12:06:40,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2020-11-09 12:06:40,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 12:06:40,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 99 transitions. [2020-11-09 12:06:40,138 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 99 transitions. Word has length 10 [2020-11-09 12:06:40,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:40,138 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 99 transitions. [2020-11-09 12:06:40,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-09 12:06:40,139 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 99 transitions. [2020-11-09 12:06:40,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 12:06:40,139 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:40,139 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:40,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-09 12:06:40,140 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:40,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:40,140 INFO L82 PathProgramCache]: Analyzing trace with hash 735328415, now seen corresponding path program 4 times [2020-11-09 12:06:40,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:40,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300914680] [2020-11-09 12:06:40,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:40,248 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 12:06:40,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300914680] [2020-11-09 12:06:40,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787038674] [2020-11-09 12:06:40,248 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 12:06:40,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 12:06:40,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:06:40,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 12:06:40,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:40,392 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:06:40,409 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 12:06:40,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:40,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-09 12:06:40,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430946689] [2020-11-09 12:06:40,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 12:06:40,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:40,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 12:06:40,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-09 12:06:40,412 INFO L87 Difference]: Start difference. First operand 41 states and 99 transitions. Second operand 8 states. [2020-11-09 12:06:40,669 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2020-11-09 12:06:40,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:40,862 INFO L93 Difference]: Finished difference Result 63 states and 147 transitions. [2020-11-09 12:06:40,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 12:06:40,863 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-09 12:06:40,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:40,867 INFO L225 Difference]: With dead ends: 63 [2020-11-09 12:06:40,867 INFO L226 Difference]: Without dead ends: 54 [2020-11-09 12:06:40,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-11-09 12:06:40,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-09 12:06:40,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-11-09 12:06:40,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-09 12:06:40,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 87 transitions. [2020-11-09 12:06:40,881 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 87 transitions. Word has length 11 [2020-11-09 12:06:40,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:40,885 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 87 transitions. [2020-11-09 12:06:40,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 12:06:40,886 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 87 transitions. [2020-11-09 12:06:40,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 12:06:40,887 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:40,887 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:41,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-09 12:06:41,088 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:41,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:41,089 INFO L82 PathProgramCache]: Analyzing trace with hash 128488628, now seen corresponding path program 5 times [2020-11-09 12:06:41,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:41,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076540098] [2020-11-09 12:06:41,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:41,162 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 12:06:41,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076540098] [2020-11-09 12:06:41,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59486848] [2020-11-09 12:06:41,163 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 12:06:41,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 12:06:41,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:06:41,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 12:06:41,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:41,262 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:06:41,274 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 12:06:41,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:41,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-09 12:06:41,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547188109] [2020-11-09 12:06:41,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 12:06:41,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:41,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 12:06:41,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-09 12:06:41,277 INFO L87 Difference]: Start difference. First operand 37 states and 87 transitions. Second operand 8 states. [2020-11-09 12:06:41,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:41,408 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-11-09 12:06:41,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-09 12:06:41,409 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-09 12:06:41,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:41,410 INFO L225 Difference]: With dead ends: 56 [2020-11-09 12:06:41,410 INFO L226 Difference]: Without dead ends: 51 [2020-11-09 12:06:41,410 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 12:06:41,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-09 12:06:41,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-11-09 12:06:41,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-09 12:06:41,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-11-09 12:06:41,416 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-11-09 12:06:41,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:41,416 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-11-09 12:06:41,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 12:06:41,417 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-11-09 12:06:41,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 12:06:41,418 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:41,418 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:41,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:06:41,632 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:41,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:41,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1416964401, now seen corresponding path program 6 times [2020-11-09 12:06:41,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:41,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97908849] [2020-11-09 12:06:41,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:41,734 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 12:06:41,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97908849] [2020-11-09 12:06:41,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038474031] [2020-11-09 12:06:41,735 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 12:06:41,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-09 12:06:41,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:06:41,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 12:06:41,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:41,816 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:06:41,831 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 12:06:41,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:41,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-09 12:06:41,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530576919] [2020-11-09 12:06:41,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 12:06:41,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:41,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 12:06:41,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-09 12:06:41,833 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-11-09 12:06:41,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:41,995 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-11-09 12:06:41,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-09 12:06:41,995 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-09 12:06:41,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:41,996 INFO L225 Difference]: With dead ends: 56 [2020-11-09 12:06:41,996 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 12:06:41,997 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 12:06:41,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 12:06:42,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-11-09 12:06:42,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-09 12:06:42,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-11-09 12:06:42,005 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-11-09 12:06:42,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:42,005 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-11-09 12:06:42,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 12:06:42,005 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-11-09 12:06:42,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 12:06:42,006 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:42,006 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:42,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:06:42,207 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:42,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:42,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1320372483, now seen corresponding path program 7 times [2020-11-09 12:06:42,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:42,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762616833] [2020-11-09 12:06:42,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:42,301 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 12:06:42,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762616833] [2020-11-09 12:06:42,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221085718] [2020-11-09 12:06:42,302 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 12:06:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:42,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 12:06:42,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:42,406 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:06:42,417 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 12:06:42,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:42,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-09 12:06:42,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023035554] [2020-11-09 12:06:42,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 12:06:42,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:42,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 12:06:42,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-09 12:06:42,420 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 9 states. [2020-11-09 12:06:42,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:42,621 INFO L93 Difference]: Finished difference Result 63 states and 149 transitions. [2020-11-09 12:06:42,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-09 12:06:42,623 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-09 12:06:42,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:42,624 INFO L225 Difference]: With dead ends: 63 [2020-11-09 12:06:42,624 INFO L226 Difference]: Without dead ends: 58 [2020-11-09 12:06:42,625 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 12:06:42,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-09 12:06:42,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-11-09 12:06:42,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 12:06:42,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-11-09 12:06:42,635 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 12 [2020-11-09 12:06:42,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:42,635 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-11-09 12:06:42,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 12:06:42,636 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-11-09 12:06:42,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 12:06:42,636 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:42,637 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:42,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:06:42,850 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:42,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:42,851 INFO L82 PathProgramCache]: Analyzing trace with hash -311794613, now seen corresponding path program 8 times [2020-11-09 12:06:42,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:42,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158413652] [2020-11-09 12:06:42,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:42,974 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 12:06:42,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158413652] [2020-11-09 12:06:42,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276120105] [2020-11-09 12:06:42,974 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 12:06:43,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 12:06:43,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:06:43,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 12:06:43,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:43,069 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:06:43,085 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 12:06:43,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:43,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-09 12:06:43,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756688229] [2020-11-09 12:06:43,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 12:06:43,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:43,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 12:06:43,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-09 12:06:43,088 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 9 states. [2020-11-09 12:06:43,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:43,378 INFO L93 Difference]: Finished difference Result 71 states and 167 transitions. [2020-11-09 12:06:43,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-09 12:06:43,379 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-09 12:06:43,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:43,380 INFO L225 Difference]: With dead ends: 71 [2020-11-09 12:06:43,380 INFO L226 Difference]: Without dead ends: 62 [2020-11-09 12:06:43,381 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 12:06:43,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-09 12:06:43,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2020-11-09 12:06:43,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-09 12:06:43,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-11-09 12:06:43,402 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 12 [2020-11-09 12:06:43,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:43,403 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-11-09 12:06:43,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 12:06:43,403 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-11-09 12:06:43,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 12:06:43,404 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:43,409 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:43,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-09 12:06:43,623 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:43,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:43,624 INFO L82 PathProgramCache]: Analyzing trace with hash -2018100772, now seen corresponding path program 9 times [2020-11-09 12:06:43,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:43,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429501713] [2020-11-09 12:06:43,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:43,759 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 12:06:43,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429501713] [2020-11-09 12:06:43,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51028978] [2020-11-09 12:06:43,760 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 12:06:43,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-09 12:06:43,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:06:43,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 12:06:43,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:43,901 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 12:06:43,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:43,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-09 12:06:43,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307753345] [2020-11-09 12:06:43,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 12:06:43,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:43,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 12:06:43,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-09 12:06:43,907 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-11-09 12:06:44,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:44,250 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-11-09 12:06:44,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 12:06:44,251 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-09 12:06:44,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:44,252 INFO L225 Difference]: With dead ends: 72 [2020-11-09 12:06:44,253 INFO L226 Difference]: Without dead ends: 63 [2020-11-09 12:06:44,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-11-09 12:06:44,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-09 12:06:44,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-11-09 12:06:44,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 12:06:44,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-11-09 12:06:44,261 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 13 [2020-11-09 12:06:44,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:44,261 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-11-09 12:06:44,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 12:06:44,261 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-11-09 12:06:44,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 12:06:44,263 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:44,263 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:44,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:06:44,478 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:44,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:44,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1075670313, now seen corresponding path program 10 times [2020-11-09 12:06:44,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:44,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827298754] [2020-11-09 12:06:44,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:44,559 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 12:06:44,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827298754] [2020-11-09 12:06:44,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379868050] [2020-11-09 12:06:44,559 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 12:06:44,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 12:06:44,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:06:44,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 12:06:44,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:44,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:06:44,681 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 12:06:44,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:44,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-09 12:06:44,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219499623] [2020-11-09 12:06:44,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 12:06:44,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:44,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 12:06:44,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-09 12:06:44,683 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 10 states. [2020-11-09 12:06:44,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:44,917 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-11-09 12:06:44,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-09 12:06:44,918 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-09 12:06:44,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:44,918 INFO L225 Difference]: With dead ends: 64 [2020-11-09 12:06:44,918 INFO L226 Difference]: Without dead ends: 59 [2020-11-09 12:06:44,920 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 12:06:44,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-09 12:06:44,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-11-09 12:06:44,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 12:06:44,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-11-09 12:06:44,929 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-11-09 12:06:44,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:44,932 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-11-09 12:06:44,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 12:06:44,932 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-11-09 12:06:44,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 12:06:44,933 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:44,934 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:45,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:06:45,147 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:45,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:45,148 INFO L82 PathProgramCache]: Analyzing trace with hash 198162772, now seen corresponding path program 11 times [2020-11-09 12:06:45,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:45,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330606983] [2020-11-09 12:06:45,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:45,283 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 12:06:45,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330606983] [2020-11-09 12:06:45,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290047729] [2020-11-09 12:06:45,284 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 12:06:45,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-09 12:06:45,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:06:45,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 12:06:45,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:45,376 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:06:45,399 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 12:06:45,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:45,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-09 12:06:45,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828620515] [2020-11-09 12:06:45,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 12:06:45,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:45,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 12:06:45,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-09 12:06:45,403 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-11-09 12:06:45,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:45,589 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-09 12:06:45,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 12:06:45,590 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-09 12:06:45,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:45,592 INFO L225 Difference]: With dead ends: 64 [2020-11-09 12:06:45,592 INFO L226 Difference]: Without dead ends: 58 [2020-11-09 12:06:45,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-11-09 12:06:45,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-09 12:06:45,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-11-09 12:06:45,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-09 12:06:45,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-11-09 12:06:45,602 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-11-09 12:06:45,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:45,602 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-11-09 12:06:45,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 12:06:45,602 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-11-09 12:06:45,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 12:06:45,603 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:45,603 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:45,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-09 12:06:45,815 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:45,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:45,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1863413606, now seen corresponding path program 12 times [2020-11-09 12:06:45,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:45,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501893256] [2020-11-09 12:06:45,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:45,905 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 12:06:45,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501893256] [2020-11-09 12:06:45,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832246730] [2020-11-09 12:06:45,906 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 12:06:45,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-09 12:06:45,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:06:45,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 12:06:45,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:46,012 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:06:46,027 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 12:06:46,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:46,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-09 12:06:46,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388058645] [2020-11-09 12:06:46,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 12:06:46,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:46,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 12:06:46,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-09 12:06:46,030 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 11 states. [2020-11-09 12:06:46,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:46,403 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-11-09 12:06:46,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-09 12:06:46,403 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-09 12:06:46,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:46,404 INFO L225 Difference]: With dead ends: 73 [2020-11-09 12:06:46,405 INFO L226 Difference]: Without dead ends: 68 [2020-11-09 12:06:46,405 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 12:06:46,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-09 12:06:46,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2020-11-09 12:06:46,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-09 12:06:46,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-11-09 12:06:46,411 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 14 [2020-11-09 12:06:46,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:46,412 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-11-09 12:06:46,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 12:06:46,412 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-11-09 12:06:46,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 12:06:46,414 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:46,414 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:46,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:06:46,615 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:46,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:46,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1013983880, now seen corresponding path program 13 times [2020-11-09 12:06:46,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:46,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329216759] [2020-11-09 12:06:46,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:46,694 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 12:06:46,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329216759] [2020-11-09 12:06:46,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655814632] [2020-11-09 12:06:46,695 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 12:06:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:46,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 12:06:46,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:46,795 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:06:46,806 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 12:06:46,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:46,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-09 12:06:46,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11607285] [2020-11-09 12:06:46,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 12:06:46,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:46,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 12:06:46,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-11-09 12:06:46,809 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 11 states. [2020-11-09 12:06:47,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:47,238 INFO L93 Difference]: Finished difference Result 81 states and 191 transitions. [2020-11-09 12:06:47,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-09 12:06:47,239 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-09 12:06:47,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:47,240 INFO L225 Difference]: With dead ends: 81 [2020-11-09 12:06:47,240 INFO L226 Difference]: Without dead ends: 72 [2020-11-09 12:06:47,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-11-09 12:06:47,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-11-09 12:06:47,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-11-09 12:06:47,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 12:06:47,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-11-09 12:06:47,252 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 14 [2020-11-09 12:06:47,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:47,252 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-11-09 12:06:47,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 12:06:47,252 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-11-09 12:06:47,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-09 12:06:47,253 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:47,253 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:47,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-09 12:06:47,456 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:47,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:47,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1931272153, now seen corresponding path program 14 times [2020-11-09 12:06:47,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:47,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693967156] [2020-11-09 12:06:47,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:47,559 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 12:06:47,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693967156] [2020-11-09 12:06:47,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357201950] [2020-11-09 12:06:47,560 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 12:06:47,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 12:06:47,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:06:47,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 12:06:47,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:47,672 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:06:47,691 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 12:06:47,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:47,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-09 12:06:47,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564001093] [2020-11-09 12:06:47,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 12:06:47,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:47,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 12:06:47,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-11-09 12:06:47,693 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-11-09 12:06:48,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:48,166 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-11-09 12:06:48,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 12:06:48,166 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-09 12:06:48,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:48,167 INFO L225 Difference]: With dead ends: 82 [2020-11-09 12:06:48,167 INFO L226 Difference]: Without dead ends: 73 [2020-11-09 12:06:48,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-11-09 12:06:48,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-09 12:06:48,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-11-09 12:06:48,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-09 12:06:48,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-11-09 12:06:48,173 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 15 [2020-11-09 12:06:48,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:48,173 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-11-09 12:06:48,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 12:06:48,173 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-11-09 12:06:48,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-09 12:06:48,174 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:48,174 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:48,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-09 12:06:48,384 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:48,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:48,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1368757306, now seen corresponding path program 15 times [2020-11-09 12:06:48,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:48,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577369489] [2020-11-09 12:06:48,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:48,512 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 12:06:48,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577369489] [2020-11-09 12:06:48,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281535764] [2020-11-09 12:06:48,513 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 12:06:48,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-09 12:06:48,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:06:48,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 12:06:48,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:48,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:06:48,640 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 12:06:48,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:48,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-09 12:06:48,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167261172] [2020-11-09 12:06:48,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 12:06:48,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:48,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 12:06:48,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-09 12:06:48,643 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 12 states. [2020-11-09 12:06:49,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:49,035 INFO L93 Difference]: Finished difference Result 72 states and 173 transitions. [2020-11-09 12:06:49,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-09 12:06:49,036 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-09 12:06:49,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:49,037 INFO L225 Difference]: With dead ends: 72 [2020-11-09 12:06:49,037 INFO L226 Difference]: Without dead ends: 67 [2020-11-09 12:06:49,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-11-09 12:06:49,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-09 12:06:49,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-11-09 12:06:49,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-09 12:06:49,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-11-09 12:06:49,045 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-11-09 12:06:49,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:49,046 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-11-09 12:06:49,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 12:06:49,046 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-11-09 12:06:49,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 12:06:49,046 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:49,047 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:49,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-09 12:06:49,248 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:49,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:49,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1455869111, now seen corresponding path program 16 times [2020-11-09 12:06:49,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:49,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884233663] [2020-11-09 12:06:49,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:49,390 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 12:06:49,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884233663] [2020-11-09 12:06:49,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671455852] [2020-11-09 12:06:49,390 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 12:06:49,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 12:06:49,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:06:49,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 12:06:49,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:49,470 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:06:49,484 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 12:06:49,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:49,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-09 12:06:49,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7024409] [2020-11-09 12:06:49,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 12:06:49,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:49,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 12:06:49,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-09 12:06:49,486 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-11-09 12:06:49,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:49,718 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-11-09 12:06:49,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-09 12:06:49,719 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-11-09 12:06:49,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:49,720 INFO L225 Difference]: With dead ends: 72 [2020-11-09 12:06:49,721 INFO L226 Difference]: Without dead ends: 66 [2020-11-09 12:06:49,721 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 12:06:49,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-09 12:06:49,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-11-09 12:06:49,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-09 12:06:49,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-11-09 12:06:49,726 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-11-09 12:06:49,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:49,726 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-11-09 12:06:49,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 12:06:49,726 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-11-09 12:06:49,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 12:06:49,727 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:49,727 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:49,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-09 12:06:49,939 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:49,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:49,940 INFO L82 PathProgramCache]: Analyzing trace with hash -260077303, now seen corresponding path program 17 times [2020-11-09 12:06:49,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:49,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635589497] [2020-11-09 12:06:49,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:50,065 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 12:06:50,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635589497] [2020-11-09 12:06:50,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8376765] [2020-11-09 12:06:50,067 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 12:06:50,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-09 12:06:50,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:06:50,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 12:06:50,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:50,199 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:06:50,214 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 12:06:50,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:50,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-09 12:06:50,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016850009] [2020-11-09 12:06:50,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 12:06:50,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:50,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 12:06:50,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-09 12:06:50,217 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 13 states. [2020-11-09 12:06:50,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:50,709 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-11-09 12:06:50,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-09 12:06:50,709 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-09 12:06:50,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:50,710 INFO L225 Difference]: With dead ends: 83 [2020-11-09 12:06:50,710 INFO L226 Difference]: Without dead ends: 78 [2020-11-09 12:06:50,710 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 12:06:50,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-09 12:06:50,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2020-11-09 12:06:50,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 12:06:50,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-11-09 12:06:50,713 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 16 [2020-11-09 12:06:50,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:50,714 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-11-09 12:06:50,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 12:06:50,714 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-11-09 12:06:50,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 12:06:50,714 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:50,714 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:50,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:06:50,922 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:50,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:50,922 INFO L82 PathProgramCache]: Analyzing trace with hash -518171259, now seen corresponding path program 18 times [2020-11-09 12:06:50,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:50,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909933327] [2020-11-09 12:06:50,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:50,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:51,044 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 12:06:51,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909933327] [2020-11-09 12:06:51,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400935212] [2020-11-09 12:06:51,045 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 12:06:51,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-09 12:06:51,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:06:51,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 12:06:51,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:51,156 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:06:51,172 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 12:06:51,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:51,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-09 12:06:51,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131583730] [2020-11-09 12:06:51,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 12:06:51,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:51,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 12:06:51,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-09 12:06:51,174 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 13 states. [2020-11-09 12:06:51,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:51,711 INFO L93 Difference]: Finished difference Result 91 states and 215 transitions. [2020-11-09 12:06:51,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-09 12:06:51,712 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-09 12:06:51,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:51,714 INFO L225 Difference]: With dead ends: 91 [2020-11-09 12:06:51,714 INFO L226 Difference]: Without dead ends: 82 [2020-11-09 12:06:51,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-11-09 12:06:51,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-09 12:06:51,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2020-11-09 12:06:51,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-09 12:06:51,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-11-09 12:06:51,718 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 16 [2020-11-09 12:06:51,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:51,718 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-11-09 12:06:51,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 12:06:51,718 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-11-09 12:06:51,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-09 12:06:51,719 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:51,719 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:51,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:06:51,929 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:51,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:51,930 INFO L82 PathProgramCache]: Analyzing trace with hash 527563414, now seen corresponding path program 19 times [2020-11-09 12:06:51,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:51,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821992148] [2020-11-09 12:06:51,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:52,041 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 12:06:52,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821992148] [2020-11-09 12:06:52,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109698310] [2020-11-09 12:06:52,042 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 12:06:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:52,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 12:06:52,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:52,140 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:06:52,154 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 12:06:52,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:52,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-09 12:06:52,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512455306] [2020-11-09 12:06:52,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 12:06:52,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:52,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 12:06:52,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-11-09 12:06:52,156 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-11-09 12:06:52,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:52,755 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-11-09 12:06:52,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 12:06:52,756 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-09 12:06:52,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:52,757 INFO L225 Difference]: With dead ends: 92 [2020-11-09 12:06:52,757 INFO L226 Difference]: Without dead ends: 83 [2020-11-09 12:06:52,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 12:06:52,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-09 12:06:52,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-11-09 12:06:52,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 12:06:52,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-11-09 12:06:52,761 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 17 [2020-11-09 12:06:52,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:52,761 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-11-09 12:06:52,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 12:06:52,761 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-11-09 12:06:52,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-09 12:06:52,762 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:52,762 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:52,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:06:52,972 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:52,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:52,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1116588253, now seen corresponding path program 20 times [2020-11-09 12:06:52,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:52,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449110372] [2020-11-09 12:06:52,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:53,111 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 12:06:53,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449110372] [2020-11-09 12:06:53,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156407474] [2020-11-09 12:06:53,112 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 12:06:53,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 12:06:53,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:06:53,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-09 12:06:53,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:53,226 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 12:06:53,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:53,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-09 12:06:53,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116009907] [2020-11-09 12:06:53,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 12:06:53,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:53,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 12:06:53,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-09 12:06:53,229 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 14 states. [2020-11-09 12:06:53,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:53,811 INFO L93 Difference]: Finished difference Result 80 states and 193 transitions. [2020-11-09 12:06:53,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-09 12:06:53,812 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-09 12:06:53,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:53,813 INFO L225 Difference]: With dead ends: 80 [2020-11-09 12:06:53,813 INFO L226 Difference]: Without dead ends: 75 [2020-11-09 12:06:53,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=322, Invalid=734, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 12:06:53,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-09 12:06:53,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-11-09 12:06:53,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-09 12:06:53,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-11-09 12:06:53,818 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-11-09 12:06:53,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:53,818 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-11-09 12:06:53,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 12:06:53,818 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-11-09 12:06:53,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 12:06:53,819 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:53,819 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:54,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-09 12:06:54,031 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:54,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:54,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1069116582, now seen corresponding path program 21 times [2020-11-09 12:06:54,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:54,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909032390] [2020-11-09 12:06:54,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:54,206 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 12:06:54,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909032390] [2020-11-09 12:06:54,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617866866] [2020-11-09 12:06:54,208 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 12:06:54,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-09 12:06:54,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:06:54,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 12:06:54,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:54,289 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:06:54,314 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 12:06:54,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:54,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-09 12:06:54,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965015013] [2020-11-09 12:06:54,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 12:06:54,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:54,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 12:06:54,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-11-09 12:06:54,316 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-11-09 12:06:54,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:54,666 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-11-09 12:06:54,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 12:06:54,666 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-11-09 12:06:54,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:54,667 INFO L225 Difference]: With dead ends: 80 [2020-11-09 12:06:54,668 INFO L226 Difference]: Without dead ends: 74 [2020-11-09 12:06:54,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-11-09 12:06:54,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-09 12:06:54,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-11-09 12:06:54,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-09 12:06:54,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-11-09 12:06:54,676 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-11-09 12:06:54,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:54,676 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-11-09 12:06:54,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 12:06:54,676 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-11-09 12:06:54,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 12:06:54,677 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:54,677 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:54,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-09 12:06:54,878 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:54,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:54,879 INFO L82 PathProgramCache]: Analyzing trace with hash -825375252, now seen corresponding path program 22 times [2020-11-09 12:06:54,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:54,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82749111] [2020-11-09 12:06:54,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:54,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:55,023 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 12:06:55,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82749111] [2020-11-09 12:06:55,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343316580] [2020-11-09 12:06:55,024 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 12:06:55,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 12:06:55,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:06:55,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-09 12:06:55,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:55,127 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:06:55,148 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 12:06:55,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:55,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-09 12:06:55,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840290400] [2020-11-09 12:06:55,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 12:06:55,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:55,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 12:06:55,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-09 12:06:55,150 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 15 states. [2020-11-09 12:06:55,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:55,797 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-11-09 12:06:55,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-09 12:06:55,797 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-09 12:06:55,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:55,798 INFO L225 Difference]: With dead ends: 93 [2020-11-09 12:06:55,798 INFO L226 Difference]: Without dead ends: 88 [2020-11-09 12:06:55,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 12:06:55,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-09 12:06:55,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 53. [2020-11-09 12:06:55,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 12:06:55,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-11-09 12:06:55,803 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 18 [2020-11-09 12:06:55,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:55,803 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-11-09 12:06:55,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 12:06:55,804 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-11-09 12:06:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 12:06:55,804 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:55,804 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:56,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-09 12:06:56,013 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:56,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:56,014 INFO L82 PathProgramCache]: Analyzing trace with hash 254522690, now seen corresponding path program 23 times [2020-11-09 12:06:56,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:56,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138018453] [2020-11-09 12:06:56,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:56,133 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 12:06:56,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138018453] [2020-11-09 12:06:56,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663382284] [2020-11-09 12:06:56,133 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 12:06:56,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-09 12:06:56,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:06:56,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-09 12:06:56,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:56,243 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:06:56,257 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 12:06:56,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:56,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-09 12:06:56,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121901881] [2020-11-09 12:06:56,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 12:06:56,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:56,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 12:06:56,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-09 12:06:56,259 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 15 states. [2020-11-09 12:06:56,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:56,948 INFO L93 Difference]: Finished difference Result 101 states and 239 transitions. [2020-11-09 12:06:56,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-09 12:06:56,949 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-09 12:06:56,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:56,950 INFO L225 Difference]: With dead ends: 101 [2020-11-09 12:06:56,950 INFO L226 Difference]: Without dead ends: 92 [2020-11-09 12:06:56,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 12:06:56,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-11-09 12:06:56,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-11-09 12:06:56,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-09 12:06:56,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-11-09 12:06:56,955 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 18 [2020-11-09 12:06:56,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:56,955 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-11-09 12:06:56,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 12:06:56,955 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-11-09 12:06:56,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-09 12:06:56,956 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:56,956 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:57,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-09 12:06:57,160 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:57,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:57,160 INFO L82 PathProgramCache]: Analyzing trace with hash 183196179, now seen corresponding path program 24 times [2020-11-09 12:06:57,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:57,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43638139] [2020-11-09 12:06:57,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:57,312 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 12:06:57,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43638139] [2020-11-09 12:06:57,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657703518] [2020-11-09 12:06:57,312 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 12:06:57,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-09 12:06:57,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:06:57,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-09 12:06:57,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:57,434 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 12:06:57,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:57,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-09 12:06:57,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468888008] [2020-11-09 12:06:57,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-09 12:06:57,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:57,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-09 12:06:57,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-11-09 12:06:57,436 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-11-09 12:06:58,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:58,187 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-11-09 12:06:58,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-09 12:06:58,187 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-11-09 12:06:58,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:58,188 INFO L225 Difference]: With dead ends: 102 [2020-11-09 12:06:58,188 INFO L226 Difference]: Without dead ends: 93 [2020-11-09 12:06:58,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 12:06:58,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-09 12:06:58,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2020-11-09 12:06:58,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 12:06:58,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-11-09 12:06:58,192 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 19 [2020-11-09 12:06:58,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:58,192 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-11-09 12:06:58,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-09 12:06:58,192 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-11-09 12:06:58,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-09 12:06:58,193 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:58,193 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:58,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-09 12:06:58,401 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:58,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:58,402 INFO L82 PathProgramCache]: Analyzing trace with hash -699703104, now seen corresponding path program 25 times [2020-11-09 12:06:58,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:58,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130275376] [2020-11-09 12:06:58,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:58,555 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 12:06:58,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130275376] [2020-11-09 12:06:58,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482119466] [2020-11-09 12:06:58,555 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 12:06:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:58,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 12:06:58,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:58,673 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:06:58,693 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 12:06:58,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:58,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-09 12:06:58,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822630197] [2020-11-09 12:06:58,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-09 12:06:58,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:58,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-09 12:06:58,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-11-09 12:06:58,695 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 16 states. [2020-11-09 12:06:59,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:59,374 INFO L93 Difference]: Finished difference Result 88 states and 213 transitions. [2020-11-09 12:06:59,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-09 12:06:59,375 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-11-09 12:06:59,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:59,375 INFO L225 Difference]: With dead ends: 88 [2020-11-09 12:06:59,375 INFO L226 Difference]: Without dead ends: 83 [2020-11-09 12:06:59,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 12:06:59,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-09 12:06:59,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-11-09 12:06:59,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-09 12:06:59,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-11-09 12:06:59,378 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-11-09 12:06:59,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:59,378 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-11-09 12:06:59,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-09 12:06:59,379 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-11-09 12:06:59,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 12:06:59,379 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:59,379 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:59,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:06:59,581 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:59,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:59,581 INFO L82 PathProgramCache]: Analyzing trace with hash -923845315, now seen corresponding path program 26 times [2020-11-09 12:06:59,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:59,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629280334] [2020-11-09 12:06:59,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:59,787 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 12:06:59,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629280334] [2020-11-09 12:06:59,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740482273] [2020-11-09 12:06:59,788 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 12:06:59,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 12:06:59,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:06:59,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 12:06:59,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:59,866 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:06:59,885 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 12:06:59,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:59,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-09 12:06:59,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672002196] [2020-11-09 12:06:59,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-09 12:06:59,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:59,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-09 12:06:59,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-11-09 12:06:59,887 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-11-09 12:07:00,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:07:00,264 INFO L93 Difference]: Finished difference Result 88 states and 211 transitions. [2020-11-09 12:07:00,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-09 12:07:00,265 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-11-09 12:07:00,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:07:00,266 INFO L225 Difference]: With dead ends: 88 [2020-11-09 12:07:00,266 INFO L226 Difference]: Without dead ends: 82 [2020-11-09 12:07:00,267 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 12:07:00,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-09 12:07:00,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2020-11-09 12:07:00,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-09 12:07:00,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-11-09 12:07:00,270 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 20 [2020-11-09 12:07:00,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:07:00,270 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-11-09 12:07:00,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-09 12:07:00,270 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-11-09 12:07:00,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 12:07:00,271 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:07:00,271 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:07:00,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-09 12:07:00,481 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:07:00,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:07:00,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1384142351, now seen corresponding path program 27 times [2020-11-09 12:07:00,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:07:00,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673176836] [2020-11-09 12:07:00,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:07:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:07:00,663 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 12:07:00,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673176836] [2020-11-09 12:07:00,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156796731] [2020-11-09 12:07:00,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:07:00,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-09 12:07:00,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:07:00,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-09 12:07:00,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:07:00,795 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:07:00,816 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 12:07:00,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:07:00,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-09 12:07:00,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499004167] [2020-11-09 12:07:00,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 12:07:00,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:07:00,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 12:07:00,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-09 12:07:00,819 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 17 states. [2020-11-09 12:07:01,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:07:01,667 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-11-09 12:07:01,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-09 12:07:01,668 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-11-09 12:07:01,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:07:01,669 INFO L225 Difference]: With dead ends: 103 [2020-11-09 12:07:01,669 INFO L226 Difference]: Without dead ends: 98 [2020-11-09 12:07:01,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 12:07:01,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-09 12:07:01,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 57. [2020-11-09 12:07:01,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-09 12:07:01,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-11-09 12:07:01,674 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 20 [2020-11-09 12:07:01,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:07:01,674 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-11-09 12:07:01,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 12:07:01,674 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-11-09 12:07:01,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 12:07:01,675 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:07:01,675 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:07:01,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-09 12:07:01,876 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:07:01,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:07:01,877 INFO L82 PathProgramCache]: Analyzing trace with hash -215934529, now seen corresponding path program 28 times [2020-11-09 12:07:01,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:07:01,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060717432] [2020-11-09 12:07:01,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:07:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:07:02,033 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 12:07:02,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060717432] [2020-11-09 12:07:02,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489148643] [2020-11-09 12:07:02,033 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 12:07:02,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 12:07:02,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:07:02,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-09 12:07:02,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:07:02,135 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:07:02,150 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 12:07:02,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:07:02,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-09 12:07:02,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302969401] [2020-11-09 12:07:02,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 12:07:02,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:07:02,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 12:07:02,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-11-09 12:07:02,152 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 17 states. [2020-11-09 12:07:03,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:07:03,035 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-11-09 12:07:03,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-09 12:07:03,039 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-11-09 12:07:03,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:07:03,040 INFO L225 Difference]: With dead ends: 111 [2020-11-09 12:07:03,040 INFO L226 Difference]: Without dead ends: 102 [2020-11-09 12:07:03,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 12:07:03,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-09 12:07:03,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2020-11-09 12:07:03,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-09 12:07:03,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-11-09 12:07:03,046 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 20 [2020-11-09 12:07:03,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:07:03,046 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-11-09 12:07:03,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 12:07:03,046 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-11-09 12:07:03,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-09 12:07:03,047 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:07:03,048 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:07:03,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:07:03,258 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:07:03,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:07:03,258 INFO L82 PathProgramCache]: Analyzing trace with hash -41234864, now seen corresponding path program 29 times [2020-11-09 12:07:03,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:07:03,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442078383] [2020-11-09 12:07:03,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:07:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:07:03,439 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 12:07:03,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442078383] [2020-11-09 12:07:03,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928056666] [2020-11-09 12:07:03,440 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 12:07:03,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-09 12:07:03,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:07:03,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 12:07:03,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:07:03,545 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:07:03,562 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 12:07:03,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:07:03,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-09 12:07:03,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985184404] [2020-11-09 12:07:03,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 12:07:03,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:07:03,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 12:07:03,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-11-09 12:07:03,564 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-11-09 12:07:04,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:07:04,476 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-11-09 12:07:04,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 12:07:04,478 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-11-09 12:07:04,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:07:04,479 INFO L225 Difference]: With dead ends: 112 [2020-11-09 12:07:04,479 INFO L226 Difference]: Without dead ends: 103 [2020-11-09 12:07:04,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-11-09 12:07:04,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-09 12:07:04,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 57. [2020-11-09 12:07:04,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-09 12:07:04,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-11-09 12:07:04,482 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 21 [2020-11-09 12:07:04,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:07:04,482 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-11-09 12:07:04,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 12:07:04,483 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-11-09 12:07:04,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-09 12:07:04,483 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:07:04,483 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:07:04,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:07:04,693 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:07:04,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:07:04,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1895992291, now seen corresponding path program 30 times [2020-11-09 12:07:04,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:07:04,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236695483] [2020-11-09 12:07:04,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:07:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:07:04,875 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 12:07:04,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236695483] [2020-11-09 12:07:04,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253138538] [2020-11-09 12:07:04,875 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 12:07:04,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-09 12:07:04,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:07:04,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 12:07:04,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:07:04,989 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:07:05,012 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 12:07:05,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:07:05,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-09 12:07:05,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497026502] [2020-11-09 12:07:05,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 12:07:05,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:07:05,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 12:07:05,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-11-09 12:07:05,015 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 18 states. [2020-11-09 12:07:05,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:07:05,885 INFO L93 Difference]: Finished difference Result 96 states and 233 transitions. [2020-11-09 12:07:05,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-09 12:07:05,885 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-11-09 12:07:05,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:07:05,887 INFO L225 Difference]: With dead ends: 96 [2020-11-09 12:07:05,887 INFO L226 Difference]: Without dead ends: 91 [2020-11-09 12:07:05,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 12:07:05,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-11-09 12:07:05,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-11-09 12:07:05,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-09 12:07:05,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-11-09 12:07:05,891 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-11-09 12:07:05,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:07:05,891 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-11-09 12:07:05,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 12:07:05,891 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-11-09 12:07:05,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 12:07:05,892 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:07:05,892 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:07:06,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-11-09 12:07:06,101 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:07:06,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:07:06,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1242888800, now seen corresponding path program 31 times [2020-11-09 12:07:06,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:07:06,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907936505] [2020-11-09 12:07:06,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:07:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:07:06,356 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:07:06,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907936505] [2020-11-09 12:07:06,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694801180] [2020-11-09 12:07:06,357 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 12:07:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:07:06,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 12:07:06,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:07:06,429 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:07:06,445 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 12:07:06,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:07:06,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-11-09 12:07:06,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162966681] [2020-11-09 12:07:06,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 12:07:06,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:07:06,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 12:07:06,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-11-09 12:07:06,447 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-11-09 12:07:06,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:07:06,901 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-11-09 12:07:06,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 12:07:06,901 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-11-09 12:07:06,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:07:06,903 INFO L225 Difference]: With dead ends: 96 [2020-11-09 12:07:06,903 INFO L226 Difference]: Without dead ends: 90 [2020-11-09 12:07:06,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=352, Invalid=704, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 12:07:06,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-09 12:07:06,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2020-11-09 12:07:06,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-09 12:07:06,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-11-09 12:07:06,907 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 22 [2020-11-09 12:07:06,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:07:06,908 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-11-09 12:07:06,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 12:07:06,908 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-11-09 12:07:06,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 12:07:06,908 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:07:06,908 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:07:07,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:07:07,117 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:07:07,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:07:07,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1278252686, now seen corresponding path program 32 times [2020-11-09 12:07:07,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:07:07,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708599503] [2020-11-09 12:07:07,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:07:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:07:07,295 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 12:07:07,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708599503] [2020-11-09 12:07:07,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788325028] [2020-11-09 12:07:07,296 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 12:07:07,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 12:07:07,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:07:07,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-09 12:07:07,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:07:07,427 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:07:07,445 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 12:07:07,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:07:07,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-09 12:07:07,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280517900] [2020-11-09 12:07:07,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-09 12:07:07,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:07:07,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-09 12:07:07,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-11-09 12:07:07,447 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 19 states. [2020-11-09 12:07:08,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:07:08,436 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-11-09 12:07:08,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-09 12:07:08,437 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-11-09 12:07:08,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:07:08,438 INFO L225 Difference]: With dead ends: 113 [2020-11-09 12:07:08,438 INFO L226 Difference]: Without dead ends: 108 [2020-11-09 12:07:08,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-11-09 12:07:08,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-09 12:07:08,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 61. [2020-11-09 12:07:08,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-09 12:07:08,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-11-09 12:07:08,443 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 22 [2020-11-09 12:07:08,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:07:08,443 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-11-09 12:07:08,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-09 12:07:08,443 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-11-09 12:07:08,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 12:07:08,443 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:07:08,444 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:07:08,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-09 12:07:08,655 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:07:08,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:07:08,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1353755908, now seen corresponding path program 33 times [2020-11-09 12:07:08,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:07:08,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661184693] [2020-11-09 12:07:08,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:07:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:07:08,879 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 12:07:08,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661184693] [2020-11-09 12:07:08,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938005021] [2020-11-09 12:07:08,880 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 12:07:08,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-09 12:07:08,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:07:08,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 12:07:08,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:07:09,011 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 12:07:09,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:07:09,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-09 12:07:09,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934912541] [2020-11-09 12:07:09,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-09 12:07:09,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:07:09,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-09 12:07:09,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-11-09 12:07:09,014 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 19 states. [2020-11-09 12:07:09,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:07:09,972 INFO L93 Difference]: Finished difference Result 121 states and 287 transitions. [2020-11-09 12:07:09,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 12:07:09,973 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-11-09 12:07:09,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:07:09,974 INFO L225 Difference]: With dead ends: 121 [2020-11-09 12:07:09,974 INFO L226 Difference]: Without dead ends: 112 [2020-11-09 12:07:09,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=587, Invalid=1483, Unknown=0, NotChecked=0, Total=2070 [2020-11-09 12:07:09,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-09 12:07:09,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 77. [2020-11-09 12:07:09,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-09 12:07:09,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-11-09 12:07:09,978 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 22 [2020-11-09 12:07:09,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:07:09,978 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-11-09 12:07:09,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-09 12:07:09,978 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-11-09 12:07:09,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-09 12:07:09,979 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:07:09,979 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:07:10,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:07:10,190 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:07:10,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:07:10,190 INFO L82 PathProgramCache]: Analyzing trace with hash -971102387, now seen corresponding path program 34 times [2020-11-09 12:07:10,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:07:10,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678511498] [2020-11-09 12:07:10,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:07:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:07:10,417 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 12:07:10,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678511498] [2020-11-09 12:07:10,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613312962] [2020-11-09 12:07:10,417 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 12:07:10,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 12:07:10,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:07:10,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 12:07:10,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:07:10,526 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:07:10,546 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 12:07:10,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:07:10,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-09 12:07:10,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699555121] [2020-11-09 12:07:10,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 12:07:10,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:07:10,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 12:07:10,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-11-09 12:07:10,548 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-11-09 12:07:11,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:07:11,682 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-11-09 12:07:11,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-09 12:07:11,683 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-11-09 12:07:11,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:07:11,684 INFO L225 Difference]: With dead ends: 122 [2020-11-09 12:07:11,684 INFO L226 Difference]: Without dead ends: 113 [2020-11-09 12:07:11,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-11-09 12:07:11,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-11-09 12:07:11,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 61. [2020-11-09 12:07:11,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-09 12:07:11,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-11-09 12:07:11,690 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 23 [2020-11-09 12:07:11,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:07:11,690 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-11-09 12:07:11,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 12:07:11,691 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-11-09 12:07:11,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-09 12:07:11,691 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:07:11,691 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:07:11,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-09 12:07:11,902 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:07:11,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:07:11,903 INFO L82 PathProgramCache]: Analyzing trace with hash 983267910, now seen corresponding path program 35 times [2020-11-09 12:07:11,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:07:11,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361852254] [2020-11-09 12:07:11,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:07:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:07:12,117 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 12:07:12,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361852254] [2020-11-09 12:07:12,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856269081] [2020-11-09 12:07:12,118 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 12:07:12,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-09 12:07:12,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:07:12,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 12:07:12,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:07:12,225 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:07:12,252 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 12:07:12,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:07:12,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-09 12:07:12,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343108070] [2020-11-09 12:07:12,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 12:07:12,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:07:12,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 12:07:12,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-11-09 12:07:12,254 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 20 states. [2020-11-09 12:07:13,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:07:13,339 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-11-09 12:07:13,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-09 12:07:13,339 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-11-09 12:07:13,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:07:13,341 INFO L225 Difference]: With dead ends: 104 [2020-11-09 12:07:13,341 INFO L226 Difference]: Without dead ends: 99 [2020-11-09 12:07:13,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-11-09 12:07:13,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-09 12:07:13,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2020-11-09 12:07:13,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-09 12:07:13,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-11-09 12:07:13,354 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-11-09 12:07:13,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:07:13,354 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-11-09 12:07:13,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 12:07:13,354 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-11-09 12:07:13,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 12:07:13,355 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:07:13,355 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:07:13,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-09 12:07:13,565 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:07:13,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:07:13,565 INFO L82 PathProgramCache]: Analyzing trace with hash 415234755, now seen corresponding path program 36 times [2020-11-09 12:07:13,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:07:13,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476196608] [2020-11-09 12:07:13,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:07:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:07:13,880 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 12:07:13,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476196608] [2020-11-09 12:07:13,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72743038] [2020-11-09 12:07:13,881 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 12:07:13,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-09 12:07:13,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:07:13,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 12:07:13,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:07:13,961 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:07:13,981 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 12:07:13,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:07:13,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-11-09 12:07:13,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031920285] [2020-11-09 12:07:13,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 12:07:13,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:07:13,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 12:07:13,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-11-09 12:07:13,983 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-11-09 12:07:14,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:07:14,522 INFO L93 Difference]: Finished difference Result 104 states and 251 transitions. [2020-11-09 12:07:14,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-09 12:07:14,523 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-11-09 12:07:14,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:07:14,524 INFO L225 Difference]: With dead ends: 104 [2020-11-09 12:07:14,525 INFO L226 Difference]: Without dead ends: 98 [2020-11-09 12:07:14,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 12:07:14,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-09 12:07:14,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-11-09 12:07:14,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-09 12:07:14,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-11-09 12:07:14,528 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 24 [2020-11-09 12:07:14,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:07:14,529 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-11-09 12:07:14,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 12:07:14,529 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-11-09 12:07:14,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 12:07:14,530 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:07:14,530 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:07:14,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-09 12:07:14,741 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:07:14,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:07:14,741 INFO L82 PathProgramCache]: Analyzing trace with hash -39374827, now seen corresponding path program 37 times [2020-11-09 12:07:14,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:07:14,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423708441] [2020-11-09 12:07:14,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:07:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:07:14,980 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 12:07:14,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423708441] [2020-11-09 12:07:14,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289528230] [2020-11-09 12:07:14,981 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 12:07:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:07:15,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-09 12:07:15,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:07:15,105 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:07:15,125 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 12:07:15,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:07:15,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-09 12:07:15,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809309843] [2020-11-09 12:07:15,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 12:07:15,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:07:15,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 12:07:15,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-11-09 12:07:15,127 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 21 states. [2020-11-09 12:07:16,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:07:16,329 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-11-09 12:07:16,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-09 12:07:16,330 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-09 12:07:16,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:07:16,331 INFO L225 Difference]: With dead ends: 123 [2020-11-09 12:07:16,331 INFO L226 Difference]: Without dead ends: 118 [2020-11-09 12:07:16,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-11-09 12:07:16,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-11-09 12:07:16,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 65. [2020-11-09 12:07:16,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-09 12:07:16,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-11-09 12:07:16,336 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 24 [2020-11-09 12:07:16,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:07:16,336 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-11-09 12:07:16,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 12:07:16,336 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-11-09 12:07:16,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 12:07:16,337 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:07:16,337 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:07:16,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-09 12:07:16,538 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:07:16,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:07:16,539 INFO L82 PathProgramCache]: Analyzing trace with hash 416559353, now seen corresponding path program 38 times [2020-11-09 12:07:16,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:07:16,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504704652] [2020-11-09 12:07:16,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:07:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:07:16,779 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 12:07:16,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504704652] [2020-11-09 12:07:16,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112581007] [2020-11-09 12:07:16,780 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 12:07:16,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 12:07:16,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:07:16,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 12:07:16,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:07:16,926 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 12:07:16,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:07:16,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-09 12:07:16,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949797154] [2020-11-09 12:07:16,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 12:07:16,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:07:16,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 12:07:16,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-11-09 12:07:16,928 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 21 states. [2020-11-09 12:07:18,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:07:18,133 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-11-09 12:07:18,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-09 12:07:18,134 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-09 12:07:18,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:07:18,135 INFO L225 Difference]: With dead ends: 131 [2020-11-09 12:07:18,135 INFO L226 Difference]: Without dead ends: 122 [2020-11-09 12:07:18,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2020-11-09 12:07:18,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-11-09 12:07:18,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 83. [2020-11-09 12:07:18,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-09 12:07:18,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-11-09 12:07:18,140 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 24 [2020-11-09 12:07:18,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:07:18,141 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-11-09 12:07:18,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 12:07:18,141 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-11-09 12:07:18,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-09 12:07:18,141 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:07:18,142 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:07:18,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-09 12:07:18,343 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:07:18,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:07:18,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1220594422, now seen corresponding path program 39 times [2020-11-09 12:07:18,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:07:18,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686929410] [2020-11-09 12:07:18,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:07:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:07:18,590 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 12:07:18,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686929410] [2020-11-09 12:07:18,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721993465] [2020-11-09 12:07:18,591 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 12:07:18,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-09 12:07:18,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:07:18,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 12:07:18,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:07:18,709 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:07:18,736 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 12:07:18,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:07:18,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-09 12:07:18,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883073029] [2020-11-09 12:07:18,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-09 12:07:18,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:07:18,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-09 12:07:18,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-11-09 12:07:18,738 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-11-09 12:07:20,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:07:20,083 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-11-09 12:07:20,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-09 12:07:20,084 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-11-09 12:07:20,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:07:20,085 INFO L225 Difference]: With dead ends: 132 [2020-11-09 12:07:20,085 INFO L226 Difference]: Without dead ends: 123 [2020-11-09 12:07:20,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-11-09 12:07:20,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-09 12:07:20,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 65. [2020-11-09 12:07:20,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-09 12:07:20,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-11-09 12:07:20,090 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 25 [2020-11-09 12:07:20,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:07:20,091 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-11-09 12:07:20,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-09 12:07:20,091 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-11-09 12:07:20,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-09 12:07:20,091 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:07:20,091 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:07:20,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-11-09 12:07:20,292 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:07:20,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:07:20,293 INFO L82 PathProgramCache]: Analyzing trace with hash 28466153, now seen corresponding path program 40 times [2020-11-09 12:07:20,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:07:20,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845802701] [2020-11-09 12:07:20,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:07:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:07:20,552 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 12:07:20,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845802701] [2020-11-09 12:07:20,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354031880] [2020-11-09 12:07:20,553 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 12:07:20,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 12:07:20,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:07:20,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 12:07:20,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:07:20,665 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:07:20,685 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 12:07:20,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:07:20,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-09 12:07:20,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219862920] [2020-11-09 12:07:20,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-09 12:07:20,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:07:20,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-09 12:07:20,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-11-09 12:07:20,687 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 22 states. [2020-11-09 12:07:21,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:07:21,969 INFO L93 Difference]: Finished difference Result 112 states and 273 transitions. [2020-11-09 12:07:21,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-09 12:07:21,970 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-11-09 12:07:21,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:07:21,971 INFO L225 Difference]: With dead ends: 112 [2020-11-09 12:07:21,971 INFO L226 Difference]: Without dead ends: 107 [2020-11-09 12:07:21,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-11-09 12:07:21,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-09 12:07:21,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-11-09 12:07:21,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-09 12:07:21,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-11-09 12:07:21,976 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-11-09 12:07:21,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:07:21,977 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-11-09 12:07:21,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-09 12:07:21,977 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-11-09 12:07:21,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 12:07:21,977 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:07:21,977 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:07:22,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-09 12:07:22,183 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:07:22,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:07:22,184 INFO L82 PathProgramCache]: Analyzing trace with hash -391352730, now seen corresponding path program 41 times [2020-11-09 12:07:22,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:07:22,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87948177] [2020-11-09 12:07:22,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:07:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:07:22,565 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 12:07:22,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87948177] [2020-11-09 12:07:22,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666385560] [2020-11-09 12:07:22,566 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 12:07:22,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-09 12:07:22,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:07:22,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 12:07:22,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:07:22,651 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:07:22,667 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 12:07:22,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:07:22,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-11-09 12:07:22,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018587608] [2020-11-09 12:07:22,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-09 12:07:22,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:07:22,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-09 12:07:22,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-11-09 12:07:22,669 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-11-09 12:07:23,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:07:23,348 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-11-09 12:07:23,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 12:07:23,348 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-11-09 12:07:23,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:07:23,350 INFO L225 Difference]: With dead ends: 112 [2020-11-09 12:07:23,350 INFO L226 Difference]: Without dead ends: 106 [2020-11-09 12:07:23,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=540, Invalid=1100, Unknown=0, NotChecked=0, Total=1640 [2020-11-09 12:07:23,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-09 12:07:23,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2020-11-09 12:07:23,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-09 12:07:23,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-11-09 12:07:23,355 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 26 [2020-11-09 12:07:23,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:07:23,355 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-11-09 12:07:23,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-09 12:07:23,355 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-11-09 12:07:23,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 12:07:23,356 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:07:23,356 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:07:23,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:07:23,568 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:07:23,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:07:23,569 INFO L82 PathProgramCache]: Analyzing trace with hash 816306680, now seen corresponding path program 42 times [2020-11-09 12:07:23,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:07:23,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719306069] [2020-11-09 12:07:23,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:07:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:07:23,859 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 12:07:23,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719306069] [2020-11-09 12:07:23,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649624588] [2020-11-09 12:07:23,859 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 12:07:23,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-09 12:07:23,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:07:23,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-09 12:07:23,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:07:23,977 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:07:24,001 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 12:07:24,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:07:24,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-09 12:07:24,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080744555] [2020-11-09 12:07:24,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 12:07:24,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:07:24,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 12:07:24,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-11-09 12:07:24,003 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 23 states. [2020-11-09 12:07:25,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:07:25,456 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-11-09 12:07:25,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-09 12:07:25,460 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-11-09 12:07:25,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:07:25,461 INFO L225 Difference]: With dead ends: 133 [2020-11-09 12:07:25,461 INFO L226 Difference]: Without dead ends: 128 [2020-11-09 12:07:25,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-11-09 12:07:25,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-11-09 12:07:25,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 69. [2020-11-09 12:07:25,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-09 12:07:25,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-11-09 12:07:25,467 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 26 [2020-11-09 12:07:25,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:07:25,467 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-11-09 12:07:25,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 12:07:25,467 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-11-09 12:07:25,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 12:07:25,468 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:07:25,468 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:07:25,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-11-09 12:07:25,679 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:07:25,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:07:25,680 INFO L82 PathProgramCache]: Analyzing trace with hash 882475958, now seen corresponding path program 43 times [2020-11-09 12:07:25,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:07:25,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373917315] [2020-11-09 12:07:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:07:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:07:25,979 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 12:07:25,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373917315] [2020-11-09 12:07:25,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494698860] [2020-11-09 12:07:25,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:07:26,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:07:26,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-09 12:07:26,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:07:26,092 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:07:26,113 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 12:07:26,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:07:26,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-09 12:07:26,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151418057] [2020-11-09 12:07:26,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 12:07:26,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:07:26,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 12:07:26,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-11-09 12:07:26,118 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 23 states. [2020-11-09 12:07:27,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:07:27,666 INFO L93 Difference]: Finished difference Result 141 states and 335 transitions. [2020-11-09 12:07:27,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-09 12:07:27,667 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-11-09 12:07:27,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:07:27,669 INFO L225 Difference]: With dead ends: 141 [2020-11-09 12:07:27,669 INFO L226 Difference]: Without dead ends: 132 [2020-11-09 12:07:27,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-11-09 12:07:27,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-11-09 12:07:27,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 89. [2020-11-09 12:07:27,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-09 12:07:27,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-11-09 12:07:27,674 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 26 [2020-11-09 12:07:27,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:07:27,674 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-11-09 12:07:27,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 12:07:27,675 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-11-09 12:07:27,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-09 12:07:27,675 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:07:27,675 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:07:27,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:07:27,887 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:07:27,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:07:27,887 INFO L82 PathProgramCache]: Analyzing trace with hash -464271481, now seen corresponding path program 44 times [2020-11-09 12:07:27,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:07:27,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329869778] [2020-11-09 12:07:27,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:07:27,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:07:28,192 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 12:07:28,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329869778] [2020-11-09 12:07:28,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74189183] [2020-11-09 12:07:28,193 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 12:07:28,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 12:07:28,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:07:28,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 12:07:28,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:07:28,310 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:07:28,332 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 12:07:28,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:07:28,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-09 12:07:28,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159259272] [2020-11-09 12:07:28,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-09 12:07:28,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:07:28,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-09 12:07:28,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-11-09 12:07:28,333 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-11-09 12:07:29,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:07:29,971 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-11-09 12:07:29,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-09 12:07:29,972 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-11-09 12:07:29,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:07:29,974 INFO L225 Difference]: With dead ends: 142 [2020-11-09 12:07:29,974 INFO L226 Difference]: Without dead ends: 133 [2020-11-09 12:07:29,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-11-09 12:07:29,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-11-09 12:07:29,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 69. [2020-11-09 12:07:29,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-09 12:07:29,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-11-09 12:07:29,981 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 27 [2020-11-09 12:07:29,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:07:29,981 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-11-09 12:07:29,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-09 12:07:29,981 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-11-09 12:07:29,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-09 12:07:29,982 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:07:29,982 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:07:30,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-11-09 12:07:30,194 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:07:30,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:07:30,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1586979020, now seen corresponding path program 45 times [2020-11-09 12:07:30,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:07:30,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546213309] [2020-11-09 12:07:30,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:07:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:07:30,501 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 12:07:30,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546213309] [2020-11-09 12:07:30,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866022999] [2020-11-09 12:07:30,502 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 12:07:30,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-09 12:07:30,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:07:30,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 12:07:30,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:07:30,633 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:07:30,658 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 12:07:30,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:07:30,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-09 12:07:30,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268617218] [2020-11-09 12:07:30,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-09 12:07:30,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:07:30,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-09 12:07:30,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-11-09 12:07:30,660 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 24 states. [2020-11-09 12:07:32,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:07:32,257 INFO L93 Difference]: Finished difference Result 120 states and 293 transitions. [2020-11-09 12:07:32,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-09 12:07:32,258 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-11-09 12:07:32,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:07:32,259 INFO L225 Difference]: With dead ends: 120 [2020-11-09 12:07:32,259 INFO L226 Difference]: Without dead ends: 115 [2020-11-09 12:07:32,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-11-09 12:07:32,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-11-09 12:07:32,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2020-11-09 12:07:32,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-09 12:07:32,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-11-09 12:07:32,264 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-11-09 12:07:32,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:07:32,264 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-11-09 12:07:32,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-09 12:07:32,265 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-11-09 12:07:32,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-09 12:07:32,265 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:07:32,265 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:07:32,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:07:32,478 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:07:32,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:07:32,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1867154761, now seen corresponding path program 46 times [2020-11-09 12:07:32,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:07:32,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323379548] [2020-11-09 12:07:32,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:07:32,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-09 12:07:32,494 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-09 12:07:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-09 12:07:32,516 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-09 12:07:32,562 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-09 12:07:32,562 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-09 12:07:32,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-11-09 12:07:32,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 12:07:32 BasicIcfg [2020-11-09 12:07:32,696 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-09 12:07:32,697 INFO L168 Benchmark]: Toolchain (without parser) took 60014.68 ms. Allocated memory was 157.3 MB in the beginning and 253.8 MB in the end (delta: 96.5 MB). Free memory was 111.4 MB in the beginning and 107.3 MB in the end (delta: 4.0 MB). Peak memory consumption was 101.5 MB. Max. memory is 8.0 GB. [2020-11-09 12:07:32,697 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 157.3 MB. Free memory is still 129.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-09 12:07:32,698 INFO L168 Benchmark]: CACSL2BoogieTranslator took 819.16 ms. Allocated memory is still 157.3 MB. Free memory was 110.7 MB in the beginning and 122.5 MB in the end (delta: -11.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2020-11-09 12:07:32,698 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.43 ms. Allocated memory is still 157.3 MB. Free memory was 122.5 MB in the beginning and 120.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-09 12:07:32,699 INFO L168 Benchmark]: Boogie Preprocessor took 39.78 ms. Allocated memory is still 157.3 MB. Free memory was 120.5 MB in the beginning and 119.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-09 12:07:32,699 INFO L168 Benchmark]: RCFGBuilder took 503.83 ms. Allocated memory is still 157.3 MB. Free memory was 119.1 MB in the beginning and 99.2 MB in the end (delta: 20.0 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-11-09 12:07:32,700 INFO L168 Benchmark]: TraceAbstraction took 58587.08 ms. Allocated memory was 157.3 MB in the beginning and 253.8 MB in the end (delta: 96.5 MB). Free memory was 98.8 MB in the beginning and 107.3 MB in the end (delta: -8.5 MB). Peak memory consumption was 89.0 MB. Max. memory is 8.0 GB. [2020-11-09 12:07:32,702 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 157.3 MB. Free memory is still 129.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 819.16 ms. Allocated memory is still 157.3 MB. Free memory was 110.7 MB in the beginning and 122.5 MB in the end (delta: -11.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 53.43 ms. Allocated memory is still 157.3 MB. Free memory was 122.5 MB in the beginning and 120.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.78 ms. Allocated memory is still 157.3 MB. Free memory was 120.5 MB in the beginning and 119.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 503.83 ms. Allocated memory is still 157.3 MB. Free memory was 119.1 MB in the beginning and 99.2 MB in the end (delta: 20.0 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 58587.08 ms. Allocated memory was 157.3 MB in the beginning and 253.8 MB in the end (delta: 96.5 MB). Free memory was 98.8 MB in the beginning and 107.3 MB in the end (delta: -8.5 MB). Peak memory consumption was 89.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 784 VarBasedMoverChecksPositive, 19 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 19 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 15 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 4.5s, 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=2, 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=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=4, 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=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=5, k=6] [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=7, k=8] [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=9, k=8] [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=9, k=10] [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: 58.3s, OverallIterations: 48, TraceHistogramMax: 10, AutomataDifference: 30.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.5s, HoareTripleCheckerStatistics: 741 SDtfs, 2963 SDslu, 3174 SDs, 0 SdLazy, 3809 SolverSat, 2392 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2188 GetRequests, 688 SyntacticMatches, 34 SemanticMatches, 1466 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14751 ImplicationChecksByTransitivity, 30.1s 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: 0.5s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 9.3s InterpolantComputationTime, 1668 NumberOfCodeBlocks, 1668 NumberOfCodeBlocksAsserted, 204 NumberOfCheckSat, 1551 ConstructedInterpolants, 0 QuantifiedInterpolants, 122223 SizeOfPredicates, 470 NumberOfNonLiveVariables, 5586 ConjunctsInSsa, 643 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...