/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/fib_bench_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-11 12:44:19,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-11 12:44:19,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-11 12:44:19,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-11 12:44:19,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-11 12:44:19,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-11 12:44:19,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-11 12:44:19,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-11 12:44:19,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-11 12:44:19,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-11 12:44:19,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-11 12:44:19,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-11 12:44:19,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-11 12:44:19,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-11 12:44:19,149 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-11 12:44:19,150 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-11 12:44:19,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-11 12:44:19,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-11 12:44:19,154 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-11 12:44:19,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-11 12:44:19,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-11 12:44:19,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-11 12:44:19,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-11 12:44:19,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-11 12:44:19,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-11 12:44:19,185 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-11 12:44:19,185 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-11 12:44:19,187 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-11 12:44:19,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-11 12:44:19,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-11 12:44:19,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-11 12:44:19,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-11 12:44:19,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-11 12:44:19,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-11 12:44:19,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-11 12:44:19,198 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-11 12:44:19,199 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-11 12:44:19,199 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-11 12:44:19,199 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-11 12:44:19,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-11 12:44:19,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-11 12:44:19,202 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 [2020-10-11 12:44:19,240 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-11 12:44:19,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-11 12:44:19,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-11 12:44:19,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-11 12:44:19,242 INFO L138 SettingsManager]: * Use SBE=true [2020-10-11 12:44:19,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-11 12:44:19,243 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-11 12:44:19,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-11 12:44:19,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-11 12:44:19,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-11 12:44:19,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-11 12:44:19,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-11 12:44:19,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-11 12:44:19,245 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-11 12:44:19,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-11 12:44:19,245 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-11 12:44:19,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-11 12:44:19,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-11 12:44:19,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-11 12:44:19,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-11 12:44:19,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-11 12:44:19,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 12:44:19,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-11 12:44:19,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-11 12:44:19,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-11 12:44:19,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-11 12:44:19,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-11 12:44:19,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-11 12:44:19,248 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-11 12:44:19,248 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-11 12:44:19,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-11 12:44:19,569 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-11 12:44:19,573 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-11 12:44:19,575 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-11 12:44:19,575 INFO L275 PluginConnector]: CDTParser initialized [2020-10-11 12:44:19,576 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2020-10-11 12:44:19,659 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d40206adc/b6bc3d19d7254c6e94270bf3ead4bd76/FLAGfa1ae5555 [2020-10-11 12:44:20,202 INFO L306 CDTParser]: Found 1 translation units. [2020-10-11 12:44:20,202 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2020-10-11 12:44:20,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d40206adc/b6bc3d19d7254c6e94270bf3ead4bd76/FLAGfa1ae5555 [2020-10-11 12:44:20,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d40206adc/b6bc3d19d7254c6e94270bf3ead4bd76 [2020-10-11 12:44:20,530 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-11 12:44:20,532 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-11 12:44:20,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-11 12:44:20,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-11 12:44:20,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-11 12:44:20,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:44:20" (1/1) ... [2020-10-11 12:44:20,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c34ed99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:20, skipping insertion in model container [2020-10-11 12:44:20,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:44:20" (1/1) ... [2020-10-11 12:44:20,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-11 12:44:20,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-11 12:44:21,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 12:44:21,069 INFO L203 MainTranslator]: Completed pre-run [2020-10-11 12:44:21,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 12:44:21,177 INFO L208 MainTranslator]: Completed translation [2020-10-11 12:44:21,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21 WrapperNode [2020-10-11 12:44:21,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-11 12:44:21,179 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-11 12:44:21,179 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-11 12:44:21,179 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-11 12:44:21,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,203 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,225 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-11 12:44:21,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-11 12:44:21,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-11 12:44:21,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-11 12:44:21,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-11 12:44:21,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-11 12:44:21,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-11 12:44:21,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-11 12:44:21,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (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 [2020-10-11 12:44:21,321 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-11 12:44:21,322 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-11 12:44:21,322 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-11 12:44:21,322 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-11 12:44:21,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-11 12:44:21,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-11 12:44:21,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-11 12:44:21,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-11 12:44:21,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-11 12:44:21,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-11 12:44:21,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-11 12:44:21,325 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-11 12:44:21,671 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-11 12:44:21,671 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-11 12:44:21,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:44:21 BoogieIcfgContainer [2020-10-11 12:44:21,674 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-11 12:44:21,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-11 12:44:21,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-11 12:44:21,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-11 12:44:21,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:44:20" (1/3) ... [2020-10-11 12:44:21,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@592ae1eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:44:21, skipping insertion in model container [2020-10-11 12:44:21,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (2/3) ... [2020-10-11 12:44:21,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@592ae1eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:44:21, skipping insertion in model container [2020-10-11 12:44:21,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:44:21" (3/3) ... [2020-10-11 12:44:21,684 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-2.i [2020-10-11 12:44:21,696 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-11 12:44:21,696 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-11 12:44:21,704 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-11 12:44:21,705 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-11 12:44:21,735 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,735 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,735 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,736 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,736 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,737 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,737 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,737 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,738 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,738 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,738 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,739 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,739 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,739 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,740 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,740 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,740 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,741 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,741 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,741 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,741 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,742 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,742 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,743 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,743 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,743 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,743 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,744 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,744 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,744 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,748 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,748 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,748 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,749 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,749 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,749 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,755 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,755 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,756 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,756 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,756 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,756 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:21,773 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-11 12:44:21,791 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 12:44:21,791 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-11 12:44:21,791 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 12:44:21,792 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 12:44:21,792 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 12:44:21,792 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 12:44:21,792 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 12:44:21,792 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 12:44:21,804 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-11 12:44:21,806 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-11 12:44:21,808 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-11 12:44:21,809 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-11 12:44:21,847 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-11 12:44:21,848 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 12:44:21,854 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-11 12:44:21,856 INFO L117 LiptonReduction]: Number of co-enabled transitions 1032 [2020-10-11 12:44:22,979 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-11 12:44:23,076 INFO L132 LiptonReduction]: Checked pairs total: 943 [2020-10-11 12:44:23,077 INFO L134 LiptonReduction]: Total number of compositions: 50 [2020-10-11 12:44:23,084 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-11 12:44:23,096 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-11 12:44:23,098 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-11 12:44:23,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-11 12:44:23,105 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:23,106 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-11 12:44:23,106 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:23,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:23,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-10-11 12:44:23,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:23,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967708393] [2020-10-11 12:44:23,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:23,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:23,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967708393] [2020-10-11 12:44:23,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 12:44:23,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 12:44:23,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771455116] [2020-10-11 12:44:23,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 12:44:23,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:23,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 12:44:23,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-11 12:44:23,416 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-11 12:44:23,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:23,505 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-11 12:44:23,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-11 12:44:23,508 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-11 12:44:23,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:23,521 INFO L225 Difference]: With dead ends: 83 [2020-10-11 12:44:23,521 INFO L226 Difference]: Without dead ends: 54 [2020-10-11 12:44:23,523 INFO L673 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 [2020-10-11 12:44:23,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-11 12:44:23,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-11 12:44:23,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 12:44:23,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-11 12:44:23,565 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-11 12:44:23,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:23,566 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-11 12:44:23,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 12:44:23,566 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-11 12:44:23,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-11 12:44:23,567 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:23,567 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:23,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-11 12:44:23,568 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:23,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:23,568 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-10-11 12:44:23,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:23,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303509978] [2020-10-11 12:44:23,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:23,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303509978] [2020-10-11 12:44:23,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 12:44:23,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 12:44:23,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542626273] [2020-10-11 12:44:23,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-11 12:44:23,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:23,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-11 12:44:23,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-11 12:44:23,683 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-11 12:44:23,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:23,741 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-11 12:44:23,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 12:44:23,742 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-11 12:44:23,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:23,743 INFO L225 Difference]: With dead ends: 80 [2020-10-11 12:44:23,744 INFO L226 Difference]: Without dead ends: 75 [2020-10-11 12:44:23,744 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-11 12:44:23,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-11 12:44:23,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-11 12:44:23,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-11 12:44:23,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-11 12:44:23,755 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-11 12:44:23,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:23,757 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-11 12:44:23,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-11 12:44:23,757 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-11 12:44:23,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-11 12:44:23,758 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:23,758 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:23,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-11 12:44:23,758 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:23,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:23,759 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-10-11 12:44:23,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:23,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949706153] [2020-10-11 12:44:23,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:23,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949706153] [2020-10-11 12:44:23,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 12:44:23,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 12:44:23,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061216038] [2020-10-11 12:44:23,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-11 12:44:23,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:23,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-11 12:44:23,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-11 12:44:23,882 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-11 12:44:23,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:23,939 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-10-11 12:44:23,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-11 12:44:23,940 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-11 12:44:23,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:23,941 INFO L225 Difference]: With dead ends: 73 [2020-10-11 12:44:23,941 INFO L226 Difference]: Without dead ends: 70 [2020-10-11 12:44:23,942 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-11 12:44:23,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-11 12:44:23,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-11 12:44:23,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-11 12:44:23,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-10-11 12:44:23,962 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-10-11 12:44:23,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:23,962 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-10-11 12:44:23,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-11 12:44:23,963 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-10-11 12:44:23,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-11 12:44:23,967 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:23,967 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:23,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-11 12:44:23,968 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:23,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:23,969 INFO L82 PathProgramCache]: Analyzing trace with hash -244724056, now seen corresponding path program 2 times [2020-10-11 12:44:23,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:23,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209845463] [2020-10-11 12:44:23,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:24,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209845463] [2020-10-11 12:44:24,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 12:44:24,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 12:44:24,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449604109] [2020-10-11 12:44:24,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-11 12:44:24,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:24,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-11 12:44:24,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-11 12:44:24,040 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-10-11 12:44:24,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:24,107 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-10-11 12:44:24,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 12:44:24,107 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-11 12:44:24,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:24,109 INFO L225 Difference]: With dead ends: 86 [2020-10-11 12:44:24,109 INFO L226 Difference]: Without dead ends: 80 [2020-10-11 12:44:24,110 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-11 12:44:24,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-11 12:44:24,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-11 12:44:24,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-11 12:44:24,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-11 12:44:24,120 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-11 12:44:24,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:24,120 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-11 12:44:24,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-11 12:44:24,121 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-11 12:44:24,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-11 12:44:24,122 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:24,122 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:24,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-11 12:44:24,123 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:24,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:24,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 2 times [2020-10-11 12:44:24,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:24,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154763512] [2020-10-11 12:44:24,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:24,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:24,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154763512] [2020-10-11 12:44:24,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856495630] [2020-10-11 12:44:24,206 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 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 [2020-10-11 12:44:24,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:24,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:24,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 12:44:24,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:24,355 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:24,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:24,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:24,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-11 12:44:24,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596925693] [2020-10-11 12:44:24,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 12:44:24,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:24,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 12:44:24,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-11 12:44:24,382 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-11 12:44:24,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:24,452 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-11 12:44:24,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:24,452 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-11 12:44:24,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:24,454 INFO L225 Difference]: With dead ends: 101 [2020-10-11 12:44:24,454 INFO L226 Difference]: Without dead ends: 96 [2020-10-11 12:44:24,454 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:24,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-11 12:44:24,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-11 12:44:24,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-11 12:44:24,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-11 12:44:24,463 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-11 12:44:24,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:24,463 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-11 12:44:24,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 12:44:24,463 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-11 12:44:24,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-11 12:44:24,464 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:24,465 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:24,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:24,678 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:24,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:24,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-10-11 12:44:24,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:24,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65569072] [2020-10-11 12:44:24,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:24,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:24,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65569072] [2020-10-11 12:44:24,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647843066] [2020-10-11 12:44:24,790 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 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 [2020-10-11 12:44:24,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:24,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:24,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 12:44:24,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:24,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:24,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-11 12:44:24,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804537297] [2020-10-11 12:44:24,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 12:44:24,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:24,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 12:44:24,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-11 12:44:24,893 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-11 12:44:24,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:24,925 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-11 12:44:24,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-11 12:44:24,925 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-11 12:44:24,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:24,926 INFO L225 Difference]: With dead ends: 84 [2020-10-11 12:44:24,927 INFO L226 Difference]: Without dead ends: 81 [2020-10-11 12:44:24,927 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-11 12:44:24,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-11 12:44:24,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-10-11 12:44:24,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 12:44:24,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-11 12:44:24,935 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-10-11 12:44:24,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:24,935 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-11 12:44:24,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 12:44:24,935 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-11 12:44:24,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-11 12:44:24,936 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:24,937 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:25,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:25,151 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:25,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:25,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1003489542, now seen corresponding path program 4 times [2020-10-11 12:44:25,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:25,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209022025] [2020-10-11 12:44:25,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:25,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:25,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:25,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209022025] [2020-10-11 12:44:25,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665742099] [2020-10-11 12:44:25,222 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 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 [2020-10-11 12:44:25,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:25,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:25,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 12:44:25,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:25,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:25,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-11 12:44:25,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323202522] [2020-10-11 12:44:25,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 12:44:25,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:25,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 12:44:25,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-11 12:44:25,388 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-10-11 12:44:25,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:25,450 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-10-11 12:44:25,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 12:44:25,451 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-11 12:44:25,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:25,452 INFO L225 Difference]: With dead ends: 90 [2020-10-11 12:44:25,452 INFO L226 Difference]: Without dead ends: 87 [2020-10-11 12:44:25,453 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-11 12:44:25,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-11 12:44:25,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-11 12:44:25,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-11 12:44:25,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-10-11 12:44:25,460 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-10-11 12:44:25,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:25,461 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-10-11 12:44:25,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 12:44:25,461 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-10-11 12:44:25,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-11 12:44:25,462 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:25,462 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:25,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:25,676 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:25,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:25,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1003511862, now seen corresponding path program 5 times [2020-10-11 12:44:25,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:25,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837794361] [2020-10-11 12:44:25,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:25,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837794361] [2020-10-11 12:44:25,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55925791] [2020-10-11 12:44:25,743 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 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 [2020-10-11 12:44:25,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:25,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:25,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 12:44:25,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:25,849 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:25,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:25,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-11 12:44:25,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686484031] [2020-10-11 12:44:25,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 12:44:25,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:25,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 12:44:25,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-11 12:44:25,864 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-10-11 12:44:25,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:25,961 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-11 12:44:25,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:25,962 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-11 12:44:25,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:25,963 INFO L225 Difference]: With dead ends: 99 [2020-10-11 12:44:25,963 INFO L226 Difference]: Without dead ends: 93 [2020-10-11 12:44:25,964 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-11 12:44:25,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-11 12:44:25,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-11 12:44:25,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-11 12:44:25,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-11 12:44:25,970 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-11 12:44:25,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:25,971 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-11 12:44:25,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 12:44:25,971 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-11 12:44:25,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:25,972 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:25,972 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:26,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:26,187 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:26,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:26,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-10-11 12:44:26,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:26,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989132780] [2020-10-11 12:44:26,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:26,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989132780] [2020-10-11 12:44:26,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 12:44:26,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 12:44:26,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103858488] [2020-10-11 12:44:26,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 12:44:26,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:26,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 12:44:26,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-11 12:44:26,263 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-11 12:44:26,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:26,294 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-10-11 12:44:26,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-11 12:44:26,295 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 12:44:26,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:26,296 INFO L225 Difference]: With dead ends: 92 [2020-10-11 12:44:26,296 INFO L226 Difference]: Without dead ends: 90 [2020-10-11 12:44:26,297 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-11 12:44:26,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-11 12:44:26,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-10-11 12:44:26,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-11 12:44:26,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-10-11 12:44:26,303 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-10-11 12:44:26,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:26,304 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-10-11 12:44:26,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 12:44:26,304 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-10-11 12:44:26,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:26,305 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:26,305 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:26,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-11 12:44:26,306 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:26,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:26,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 2 times [2020-10-11 12:44:26,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:26,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863172673] [2020-10-11 12:44:26,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:26,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:26,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863172673] [2020-10-11 12:44:26,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 12:44:26,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 12:44:26,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61063557] [2020-10-11 12:44:26,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 12:44:26,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:26,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 12:44:26,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-11 12:44:26,422 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-10-11 12:44:26,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:26,471 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-10-11 12:44:26,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 12:44:26,471 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 12:44:26,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:26,472 INFO L225 Difference]: With dead ends: 100 [2020-10-11 12:44:26,473 INFO L226 Difference]: Without dead ends: 98 [2020-10-11 12:44:26,473 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-11 12:44:26,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-11 12:44:26,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-11 12:44:26,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-11 12:44:26,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-10-11 12:44:26,478 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-10-11 12:44:26,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:26,479 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-10-11 12:44:26,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 12:44:26,479 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-10-11 12:44:26,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:26,480 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:26,480 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:26,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-11 12:44:26,481 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:26,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:26,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1490550578, now seen corresponding path program 3 times [2020-10-11 12:44:26,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:26,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964086044] [2020-10-11 12:44:26,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:26,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964086044] [2020-10-11 12:44:26,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 12:44:26,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 12:44:26,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214521695] [2020-10-11 12:44:26,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 12:44:26,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:26,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 12:44:26,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-11 12:44:26,540 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-10-11 12:44:26,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:26,617 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-11 12:44:26,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:26,618 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 12:44:26,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:26,619 INFO L225 Difference]: With dead ends: 105 [2020-10-11 12:44:26,619 INFO L226 Difference]: Without dead ends: 100 [2020-10-11 12:44:26,620 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-11 12:44:26,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-11 12:44:26,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-11 12:44:26,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-11 12:44:26,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-10-11 12:44:26,624 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-10-11 12:44:26,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:26,624 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-10-11 12:44:26,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 12:44:26,625 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-10-11 12:44:26,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:26,626 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:26,626 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:26,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-11 12:44:26,626 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:26,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:26,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-10-11 12:44:26,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:26,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879282908] [2020-10-11 12:44:26,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:26,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:26,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879282908] [2020-10-11 12:44:26,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 12:44:26,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 12:44:26,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643699862] [2020-10-11 12:44:26,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 12:44:26,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:26,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 12:44:26,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-11 12:44:26,678 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-10-11 12:44:26,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:26,743 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-11 12:44:26,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:26,744 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 12:44:26,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:26,745 INFO L225 Difference]: With dead ends: 105 [2020-10-11 12:44:26,745 INFO L226 Difference]: Without dead ends: 100 [2020-10-11 12:44:26,745 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-11 12:44:26,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-11 12:44:26,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-11 12:44:26,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-11 12:44:26,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-11 12:44:26,750 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-11 12:44:26,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:26,750 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-11 12:44:26,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 12:44:26,750 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-11 12:44:26,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:26,751 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:26,751 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:26,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-11 12:44:26,752 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:26,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:26,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1483163371, now seen corresponding path program 3 times [2020-10-11 12:44:26,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:26,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948257318] [2020-10-11 12:44:26,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:26,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:26,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948257318] [2020-10-11 12:44:26,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893162956] [2020-10-11 12:44:26,817 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 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 [2020-10-11 12:44:26,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:26,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:26,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:26,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:26,920 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:26,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:26,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:26,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-11 12:44:26,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171396294] [2020-10-11 12:44:26,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 12:44:26,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:26,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 12:44:26,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-11 12:44:26,942 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-11 12:44:27,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:27,038 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-11 12:44:27,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:44:27,039 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-11 12:44:27,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:27,041 INFO L225 Difference]: With dead ends: 122 [2020-10-11 12:44:27,041 INFO L226 Difference]: Without dead ends: 117 [2020-10-11 12:44:27,042 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:44:27,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-11 12:44:27,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-11 12:44:27,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-11 12:44:27,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-11 12:44:27,048 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-11 12:44:27,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:27,049 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-11 12:44:27,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 12:44:27,049 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-11 12:44:27,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:27,050 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:27,050 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:27,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-11 12:44:27,264 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:27,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:27,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-10-11 12:44:27,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:27,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403111775] [2020-10-11 12:44:27,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:27,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403111775] [2020-10-11 12:44:27,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039641047] [2020-10-11 12:44:27,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:44:27,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:44:27,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:27,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:27,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:27,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:27,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:27,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065314979] [2020-10-11 12:44:27,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:27,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:27,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:27,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:27,489 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-11 12:44:27,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:27,524 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-11 12:44:27,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 12:44:27,524 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-11 12:44:27,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:27,525 INFO L225 Difference]: With dead ends: 108 [2020-10-11 12:44:27,526 INFO L226 Difference]: Without dead ends: 105 [2020-10-11 12:44:27,526 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:27,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-11 12:44:27,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-11 12:44:27,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-11 12:44:27,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-10-11 12:44:27,534 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-10-11 12:44:27,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:27,534 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-10-11 12:44:27,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:27,534 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-10-11 12:44:27,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:27,535 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:27,535 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:27,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:27,747 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:27,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:27,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1043405416, now seen corresponding path program 7 times [2020-10-11 12:44:27,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:27,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114321675] [2020-10-11 12:44:27,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:27,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114321675] [2020-10-11 12:44:27,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366639639] [2020-10-11 12:44:27,818 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 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 [2020-10-11 12:44:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:27,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:27,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:27,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:27,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:27,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059597209] [2020-10-11 12:44:27,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:27,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:27,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:27,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:27,967 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-10-11 12:44:28,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:28,018 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-10-11 12:44:28,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 12:44:28,019 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-11 12:44:28,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:28,020 INFO L225 Difference]: With dead ends: 116 [2020-10-11 12:44:28,020 INFO L226 Difference]: Without dead ends: 113 [2020-10-11 12:44:28,021 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-11 12:44:28,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-11 12:44:28,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-10-11 12:44:28,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 12:44:28,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-10-11 12:44:28,029 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-10-11 12:44:28,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:28,030 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-10-11 12:44:28,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:28,030 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-10-11 12:44:28,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:28,030 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:28,031 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:28,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-11 12:44:28,237 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:28,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:28,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1044097336, now seen corresponding path program 8 times [2020-10-11 12:44:28,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:28,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428989308] [2020-10-11 12:44:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:28,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:28,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428989308] [2020-10-11 12:44:28,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344054917] [2020-10-11 12:44:28,308 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 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 [2020-10-11 12:44:28,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:28,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:28,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:28,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:28,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:28,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:28,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:28,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567753093] [2020-10-11 12:44:28,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:28,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:28,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:28,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:28,456 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-10-11 12:44:28,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:28,548 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-10-11 12:44:28,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:28,549 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-11 12:44:28,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:28,550 INFO L225 Difference]: With dead ends: 115 [2020-10-11 12:44:28,550 INFO L226 Difference]: Without dead ends: 112 [2020-10-11 12:44:28,550 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:28,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-11 12:44:28,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-11 12:44:28,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-11 12:44:28,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-10-11 12:44:28,554 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-10-11 12:44:28,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:28,555 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-10-11 12:44:28,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:28,555 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-10-11 12:44:28,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:28,556 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:28,556 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:28,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-11 12:44:28,766 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:28,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:28,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1044119656, now seen corresponding path program 9 times [2020-10-11 12:44:28,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:28,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360126569] [2020-10-11 12:44:28,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:28,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360126569] [2020-10-11 12:44:28,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702337737] [2020-10-11 12:44:28,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:28,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:28,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:28,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:28,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:28,921 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:28,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:28,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:28,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931286120] [2020-10-11 12:44:28,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:28,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:28,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:28,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:28,933 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-10-11 12:44:29,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:29,041 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-10-11 12:44:29,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:44:29,041 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-11 12:44:29,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:29,043 INFO L225 Difference]: With dead ends: 124 [2020-10-11 12:44:29,043 INFO L226 Difference]: Without dead ends: 118 [2020-10-11 12:44:29,044 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:44:29,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-11 12:44:29,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-11 12:44:29,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-11 12:44:29,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-11 12:44:29,048 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-11 12:44:29,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:29,049 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-11 12:44:29,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:29,049 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-11 12:44:29,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:29,049 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:29,050 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:29,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-11 12:44:29,261 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:29,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:29,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-10-11 12:44:29,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:29,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623610309] [2020-10-11 12:44:29,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:29,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:29,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623610309] [2020-10-11 12:44:29,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518717729] [2020-10-11 12:44:29,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:29,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:29,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:29,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:29,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:29,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:29,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:29,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804528696] [2020-10-11 12:44:29,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:29,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:29,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:29,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:29,487 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-11 12:44:29,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:29,532 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-10-11 12:44:29,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 12:44:29,533 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:29,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:29,534 INFO L225 Difference]: With dead ends: 113 [2020-10-11 12:44:29,534 INFO L226 Difference]: Without dead ends: 111 [2020-10-11 12:44:29,534 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:29,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-11 12:44:29,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-11 12:44:29,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-11 12:44:29,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-10-11 12:44:29,538 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-10-11 12:44:29,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:29,539 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-10-11 12:44:29,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:29,539 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-10-11 12:44:29,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:29,540 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:29,540 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:29,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-11 12:44:29,751 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:29,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:29,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 6 times [2020-10-11 12:44:29,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:29,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058846926] [2020-10-11 12:44:29,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:29,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058846926] [2020-10-11 12:44:29,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949448863] [2020-10-11 12:44:29,813 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 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 [2020-10-11 12:44:29,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:44:29,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:29,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:29,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:29,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:29,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:29,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814898561] [2020-10-11 12:44:29,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:29,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:29,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:29,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:29,934 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-10-11 12:44:29,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:30,000 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-10-11 12:44:30,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 12:44:30,000 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:30,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:30,001 INFO L225 Difference]: With dead ends: 118 [2020-10-11 12:44:30,001 INFO L226 Difference]: Without dead ends: 116 [2020-10-11 12:44:30,002 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:30,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-11 12:44:30,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-10-11 12:44:30,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-11 12:44:30,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-10-11 12:44:30,006 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-10-11 12:44:30,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:30,006 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-10-11 12:44:30,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:30,006 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-10-11 12:44:30,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:30,007 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:30,007 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:30,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:30,208 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:30,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:30,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 7 times [2020-10-11 12:44:30,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:30,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549765256] [2020-10-11 12:44:30,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:30,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:30,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549765256] [2020-10-11 12:44:30,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679196822] [2020-10-11 12:44:30,287 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 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 [2020-10-11 12:44:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:30,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:30,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:30,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:30,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:30,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885609348] [2020-10-11 12:44:30,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:30,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:30,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:30,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:30,420 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-10-11 12:44:30,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:30,487 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-10-11 12:44:30,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 12:44:30,488 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:30,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:30,489 INFO L225 Difference]: With dead ends: 119 [2020-10-11 12:44:30,489 INFO L226 Difference]: Without dead ends: 117 [2020-10-11 12:44:30,489 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:30,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-11 12:44:30,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-11 12:44:30,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-11 12:44:30,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-10-11 12:44:30,493 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-10-11 12:44:30,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:30,494 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-10-11 12:44:30,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:30,494 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-10-11 12:44:30,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:30,494 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:30,495 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:30,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:30,705 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:30,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:30,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 8 times [2020-10-11 12:44:30,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:30,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261026990] [2020-10-11 12:44:30,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:30,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261026990] [2020-10-11 12:44:30,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698209536] [2020-10-11 12:44:30,779 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 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 [2020-10-11 12:44:30,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:30,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:30,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:30,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:30,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:30,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:30,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:30,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857782943] [2020-10-11 12:44:30,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:30,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:30,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:30,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:30,906 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-10-11 12:44:30,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:30,958 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-10-11 12:44:30,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 12:44:30,958 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:30,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:30,959 INFO L225 Difference]: With dead ends: 122 [2020-10-11 12:44:30,959 INFO L226 Difference]: Without dead ends: 120 [2020-10-11 12:44:30,960 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-11 12:44:30,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-11 12:44:30,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-10-11 12:44:30,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-11 12:44:30,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-10-11 12:44:30,964 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-10-11 12:44:30,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:30,964 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-10-11 12:44:30,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:30,964 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-10-11 12:44:30,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:30,965 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:30,965 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:31,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-11 12:44:31,176 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:31,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:31,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 9 times [2020-10-11 12:44:31,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:31,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389258703] [2020-10-11 12:44:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:31,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389258703] [2020-10-11 12:44:31,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551765385] [2020-10-11 12:44:31,242 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 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 [2020-10-11 12:44:31,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:31,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:31,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:31,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:31,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:31,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:31,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341428064] [2020-10-11 12:44:31,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:31,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:31,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:31,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:31,363 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-10-11 12:44:31,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:31,466 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-10-11 12:44:31,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:44:31,466 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:31,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:31,467 INFO L225 Difference]: With dead ends: 123 [2020-10-11 12:44:31,467 INFO L226 Difference]: Without dead ends: 121 [2020-10-11 12:44:31,468 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-11 12:44:31,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-11 12:44:31,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-11 12:44:31,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-11 12:44:31,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-10-11 12:44:31,471 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-10-11 12:44:31,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:31,472 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-10-11 12:44:31,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:31,472 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-10-11 12:44:31,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:31,472 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:31,472 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:31,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:31,681 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:31,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:31,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 10 times [2020-10-11 12:44:31,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:31,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472284281] [2020-10-11 12:44:31,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:31,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472284281] [2020-10-11 12:44:31,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503378881] [2020-10-11 12:44:31,750 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 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 [2020-10-11 12:44:31,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:31,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:31,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:31,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:31,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:31,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:31,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152589377] [2020-10-11 12:44:31,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:31,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:31,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:31,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:31,906 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-10-11 12:44:31,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:31,977 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-11 12:44:31,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:31,978 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:31,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:31,979 INFO L225 Difference]: With dead ends: 123 [2020-10-11 12:44:31,979 INFO L226 Difference]: Without dead ends: 121 [2020-10-11 12:44:31,980 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:31,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-11 12:44:31,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-11 12:44:31,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-11 12:44:31,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-10-11 12:44:31,985 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-10-11 12:44:31,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:31,986 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-10-11 12:44:31,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:31,986 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-10-11 12:44:31,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:31,989 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:31,989 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:32,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-11 12:44:32,202 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:32,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:32,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1037565553, now seen corresponding path program 11 times [2020-10-11 12:44:32,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:32,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925535360] [2020-10-11 12:44:32,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:32,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925535360] [2020-10-11 12:44:32,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039315903] [2020-10-11 12:44:32,272 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 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 [2020-10-11 12:44:32,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:32,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:32,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:32,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:32,388 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:32,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:32,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:32,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200319514] [2020-10-11 12:44:32,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:32,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:32,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:32,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:32,427 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-10-11 12:44:32,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:32,610 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-10-11 12:44:32,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:44:32,611 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:32,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:32,613 INFO L225 Difference]: With dead ends: 133 [2020-10-11 12:44:32,613 INFO L226 Difference]: Without dead ends: 128 [2020-10-11 12:44:32,613 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:44:32,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-11 12:44:32,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-10-11 12:44:32,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-11 12:44:32,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-10-11 12:44:32,619 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-10-11 12:44:32,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:32,619 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-10-11 12:44:32,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:32,619 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-10-11 12:44:32,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:32,620 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:32,620 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:32,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:32,821 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:32,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:32,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1037573024, now seen corresponding path program 12 times [2020-10-11 12:44:32,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:32,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248297656] [2020-10-11 12:44:32,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:32,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248297656] [2020-10-11 12:44:32,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311381365] [2020-10-11 12:44:32,876 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 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 [2020-10-11 12:44:32,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:44:32,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:32,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:32,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:33,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:33,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:33,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24952136] [2020-10-11 12:44:33,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:33,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:33,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:33,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:33,014 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-10-11 12:44:33,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:33,123 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-10-11 12:44:33,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:44:33,123 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:33,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:33,124 INFO L225 Difference]: With dead ends: 127 [2020-10-11 12:44:33,124 INFO L226 Difference]: Without dead ends: 125 [2020-10-11 12:44:33,125 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:44:33,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-11 12:44:33,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-10-11 12:44:33,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-11 12:44:33,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-11 12:44:33,128 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-11 12:44:33,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:33,129 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-11 12:44:33,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:33,129 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-11 12:44:33,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:33,129 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:33,129 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:33,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-11 12:44:33,330 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:33,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:33,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 13 times [2020-10-11 12:44:33,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:33,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253299360] [2020-10-11 12:44:33,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:33,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253299360] [2020-10-11 12:44:33,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662340833] [2020-10-11 12:44:33,381 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 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 [2020-10-11 12:44:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:33,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:33,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:33,473 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:33,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:33,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:33,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366074841] [2020-10-11 12:44:33,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:33,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:33,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:33,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:33,497 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-11 12:44:33,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:33,704 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-10-11 12:44:33,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:44:33,704 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:33,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:33,705 INFO L225 Difference]: With dead ends: 141 [2020-10-11 12:44:33,705 INFO L226 Difference]: Without dead ends: 136 [2020-10-11 12:44:33,705 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-11 12:44:33,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-11 12:44:33,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-10-11 12:44:33,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-11 12:44:33,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-11 12:44:33,711 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-11 12:44:33,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:33,711 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-11 12:44:33,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:33,712 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-11 12:44:33,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:33,713 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:33,713 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:33,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-11 12:44:33,914 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:33,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:33,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1037595344, now seen corresponding path program 14 times [2020-10-11 12:44:33,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:33,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57100880] [2020-10-11 12:44:33,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:33,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57100880] [2020-10-11 12:44:33,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944123073] [2020-10-11 12:44:33,961 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 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 [2020-10-11 12:44:33,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:33,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:33,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:33,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:34,055 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:34,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:34,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:34,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925720868] [2020-10-11 12:44:34,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:34,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:34,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:34,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:34,071 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-11 12:44:34,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:34,227 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-10-11 12:44:34,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:44:34,228 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:34,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:34,229 INFO L225 Difference]: With dead ends: 136 [2020-10-11 12:44:34,230 INFO L226 Difference]: Without dead ends: 131 [2020-10-11 12:44:34,231 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:44:34,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-11 12:44:34,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-10-11 12:44:34,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-11 12:44:34,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-10-11 12:44:34,237 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-10-11 12:44:34,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:34,238 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-10-11 12:44:34,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:34,238 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-10-11 12:44:34,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:34,241 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:34,241 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:34,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-11 12:44:34,453 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:34,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:34,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1037803664, now seen corresponding path program 15 times [2020-10-11 12:44:34,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:34,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903662896] [2020-10-11 12:44:34,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:34,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903662896] [2020-10-11 12:44:34,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622806342] [2020-10-11 12:44:34,507 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 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 [2020-10-11 12:44:34,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:34,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:34,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:34,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:34,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:34,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:34,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817734692] [2020-10-11 12:44:34,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:34,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:34,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:34,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:34,628 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-10-11 12:44:34,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:34,721 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-10-11 12:44:34,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:44:34,722 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:34,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:34,723 INFO L225 Difference]: With dead ends: 130 [2020-10-11 12:44:34,723 INFO L226 Difference]: Without dead ends: 128 [2020-10-11 12:44:34,723 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-11 12:44:34,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-11 12:44:34,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-10-11 12:44:34,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-11 12:44:34,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-11 12:44:34,727 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-11 12:44:34,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:34,728 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-11 12:44:34,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:34,728 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-11 12:44:34,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:34,728 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:34,728 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:34,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-11 12:44:34,929 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:34,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:34,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 16 times [2020-10-11 12:44:34,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:34,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202855667] [2020-10-11 12:44:34,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:34,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202855667] [2020-10-11 12:44:34,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140959790] [2020-10-11 12:44:34,992 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 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 [2020-10-11 12:44:35,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:35,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:35,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:35,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:35,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:35,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:35,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908311536] [2020-10-11 12:44:35,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:35,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:35,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:35,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:35,148 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-11 12:44:35,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:35,324 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-10-11 12:44:35,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:44:35,325 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:35,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:35,326 INFO L225 Difference]: With dead ends: 131 [2020-10-11 12:44:35,327 INFO L226 Difference]: Without dead ends: 129 [2020-10-11 12:44:35,327 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:44:35,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-11 12:44:35,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-10-11 12:44:35,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-11 12:44:35,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-11 12:44:35,332 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-11 12:44:35,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:35,332 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-11 12:44:35,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:35,332 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-11 12:44:35,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:35,333 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:35,333 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:35,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-11 12:44:35,544 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:35,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:35,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 17 times [2020-10-11 12:44:35,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:35,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438460742] [2020-10-11 12:44:35,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:35,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438460742] [2020-10-11 12:44:35,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038431223] [2020-10-11 12:44:35,593 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 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 [2020-10-11 12:44:35,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:35,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:35,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:35,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:35,688 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:35,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:35,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:35,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:35,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362814370] [2020-10-11 12:44:35,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:35,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:35,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:35,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:35,697 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-11 12:44:35,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:35,821 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-11 12:44:35,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:44:35,821 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:35,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:35,822 INFO L225 Difference]: With dead ends: 131 [2020-10-11 12:44:35,822 INFO L226 Difference]: Without dead ends: 126 [2020-10-11 12:44:35,823 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:44:35,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-11 12:44:35,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-10-11 12:44:35,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-11 12:44:35,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-11 12:44:35,827 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-11 12:44:35,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:35,827 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-11 12:44:35,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:35,828 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-11 12:44:35,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:35,828 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:35,828 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:36,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:36,039 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:36,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:36,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1038489074, now seen corresponding path program 18 times [2020-10-11 12:44:36,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:36,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157818359] [2020-10-11 12:44:36,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:36,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:36,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157818359] [2020-10-11 12:44:36,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410259808] [2020-10-11 12:44:36,087 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 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 [2020-10-11 12:44:36,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:44:36,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:36,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:36,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:36,174 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:36,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:36,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:36,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:36,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304432028] [2020-10-11 12:44:36,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:36,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:36,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:36,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:36,182 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-11 12:44:36,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:36,398 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-10-11 12:44:36,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:44:36,399 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:36,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:36,401 INFO L225 Difference]: With dead ends: 145 [2020-10-11 12:44:36,401 INFO L226 Difference]: Without dead ends: 140 [2020-10-11 12:44:36,401 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-11 12:44:36,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-11 12:44:36,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-10-11 12:44:36,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-11 12:44:36,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-11 12:44:36,405 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-11 12:44:36,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:36,405 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-11 12:44:36,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:36,406 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-11 12:44:36,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:36,406 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:36,406 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:36,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-11 12:44:36,618 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:36,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:36,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1038517904, now seen corresponding path program 19 times [2020-10-11 12:44:36,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:36,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795717656] [2020-10-11 12:44:36,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:36,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795717656] [2020-10-11 12:44:36,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743813672] [2020-10-11 12:44:36,669 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 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 [2020-10-11 12:44:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:36,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:36,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:36,771 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:36,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:36,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:36,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26162404] [2020-10-11 12:44:36,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:36,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:36,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:36,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:36,788 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-11 12:44:37,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:37,005 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-10-11 12:44:37,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:44:37,005 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:37,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:37,007 INFO L225 Difference]: With dead ends: 135 [2020-10-11 12:44:37,007 INFO L226 Difference]: Without dead ends: 130 [2020-10-11 12:44:37,007 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:44:37,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-11 12:44:37,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-10-11 12:44:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-11 12:44:37,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-11 12:44:37,013 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-11 12:44:37,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:37,014 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-11 12:44:37,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:37,014 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-11 12:44:37,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:37,015 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:37,015 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:37,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:37,227 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:37,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:37,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1266597800, now seen corresponding path program 4 times [2020-10-11 12:44:37,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:37,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219528013] [2020-10-11 12:44:37,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:37,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219528013] [2020-10-11 12:44:37,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325842878] [2020-10-11 12:44:37,315 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 [2020-10-11 12:44:37,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:37,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:37,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:37,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:37,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:37,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:37,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:37,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-11 12:44:37,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969712566] [2020-10-11 12:44:37,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 12:44:37,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:37,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 12:44:37,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-11 12:44:37,495 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-11 12:44:37,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:37,598 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-11 12:44:37,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:44:37,598 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-11 12:44:37,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:37,599 INFO L225 Difference]: With dead ends: 143 [2020-10-11 12:44:37,599 INFO L226 Difference]: Without dead ends: 138 [2020-10-11 12:44:37,600 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:44:37,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-11 12:44:37,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-11 12:44:37,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-11 12:44:37,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-11 12:44:37,604 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-11 12:44:37,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:37,604 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-11 12:44:37,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 12:44:37,605 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-11 12:44:37,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:37,605 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:37,605 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:37,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-11 12:44:37,817 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:37,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:37,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 10 times [2020-10-11 12:44:37,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:37,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887404569] [2020-10-11 12:44:37,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:37,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887404569] [2020-10-11 12:44:37,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95316424] [2020-10-11 12:44:37,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:37,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:37,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:37,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:37,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:38,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:38,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:38,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:38,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509914627] [2020-10-11 12:44:38,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:38,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:38,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:38,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:38,083 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-11 12:44:38,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:38,119 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-10-11 12:44:38,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 12:44:38,119 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-11 12:44:38,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:38,120 INFO L225 Difference]: With dead ends: 132 [2020-10-11 12:44:38,120 INFO L226 Difference]: Without dead ends: 129 [2020-10-11 12:44:38,121 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:38,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-11 12:44:38,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-11 12:44:38,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-11 12:44:38,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-11 12:44:38,124 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-11 12:44:38,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:38,125 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-11 12:44:38,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:38,125 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-11 12:44:38,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:38,125 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:38,125 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:38,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-11 12:44:38,334 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:38,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:38,335 INFO L82 PathProgramCache]: Analyzing trace with hash -2014169786, now seen corresponding path program 11 times [2020-10-11 12:44:38,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:38,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142823402] [2020-10-11 12:44:38,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:38,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142823402] [2020-10-11 12:44:38,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903581921] [2020-10-11 12:44:38,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:38,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:44:38,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:38,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:38,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:38,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:38,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:38,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490005869] [2020-10-11 12:44:38,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:38,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:38,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:38,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:38,545 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-11 12:44:38,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:38,600 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-10-11 12:44:38,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:38,600 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-11 12:44:38,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:38,602 INFO L225 Difference]: With dead ends: 143 [2020-10-11 12:44:38,602 INFO L226 Difference]: Without dead ends: 140 [2020-10-11 12:44:38,602 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-11 12:44:38,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-11 12:44:38,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-10-11 12:44:38,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-11 12:44:38,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-11 12:44:38,606 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-11 12:44:38,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:38,606 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-11 12:44:38,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:38,606 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-11 12:44:38,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:38,607 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:38,607 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:38,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-11 12:44:38,816 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:38,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:38,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1992720266, now seen corresponding path program 12 times [2020-10-11 12:44:38,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:38,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28511266] [2020-10-11 12:44:38,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:38,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28511266] [2020-10-11 12:44:38,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898294147] [2020-10-11 12:44:38,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:38,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:44:38,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:38,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:38,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:39,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:39,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:39,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499735022] [2020-10-11 12:44:39,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:39,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:39,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:39,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:39,016 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-11 12:44:39,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:39,091 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-10-11 12:44:39,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:44:39,094 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-11 12:44:39,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:39,095 INFO L225 Difference]: With dead ends: 142 [2020-10-11 12:44:39,095 INFO L226 Difference]: Without dead ends: 139 [2020-10-11 12:44:39,095 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:44:39,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-11 12:44:39,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-10-11 12:44:39,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-11 12:44:39,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-11 12:44:39,099 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-10-11 12:44:39,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:39,099 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-11 12:44:39,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:39,100 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-11 12:44:39,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:39,100 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:39,100 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:39,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-11 12:44:39,309 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:39,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:39,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1992028346, now seen corresponding path program 13 times [2020-10-11 12:44:39,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:39,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143962068] [2020-10-11 12:44:39,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:39,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:39,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143962068] [2020-10-11 12:44:39,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025810816] [2020-10-11 12:44:39,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:39,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:39,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:39,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:39,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:39,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387701586] [2020-10-11 12:44:39,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:39,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:39,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:39,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:39,507 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-11 12:44:39,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:39,607 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-10-11 12:44:39,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:44:39,608 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-11 12:44:39,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:39,609 INFO L225 Difference]: With dead ends: 141 [2020-10-11 12:44:39,609 INFO L226 Difference]: Without dead ends: 138 [2020-10-11 12:44:39,609 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:44:39,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-11 12:44:39,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-10-11 12:44:39,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-11 12:44:39,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-10-11 12:44:39,613 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-10-11 12:44:39,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:39,613 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-10-11 12:44:39,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:39,613 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-10-11 12:44:39,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:39,614 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:39,614 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:39,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-11 12:44:39,825 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:39,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:39,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1992006026, now seen corresponding path program 14 times [2020-10-11 12:44:39,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:39,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280980642] [2020-10-11 12:44:39,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:39,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280980642] [2020-10-11 12:44:39,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75248942] [2020-10-11 12:44:39,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:39,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:39,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:39,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:39,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:40,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:40,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:40,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:40,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267623362] [2020-10-11 12:44:40,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:40,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:40,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:40,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:40,028 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-10-11 12:44:40,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:40,173 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-11 12:44:40,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:44:40,174 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-11 12:44:40,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:40,175 INFO L225 Difference]: With dead ends: 150 [2020-10-11 12:44:40,176 INFO L226 Difference]: Without dead ends: 144 [2020-10-11 12:44:40,176 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:44:40,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-11 12:44:40,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-10-11 12:44:40,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-11 12:44:40,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-11 12:44:40,181 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-11 12:44:40,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:40,181 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-11 12:44:40,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:40,181 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-11 12:44:40,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:40,182 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:40,182 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:40,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:40,395 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:40,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:40,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 20 times [2020-10-11 12:44:40,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:40,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299802752] [2020-10-11 12:44:40,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:40,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299802752] [2020-10-11 12:44:40,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970055406] [2020-10-11 12:44:40,466 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 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 [2020-10-11 12:44:40,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:40,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:40,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:40,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:40,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:40,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:40,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174095571] [2020-10-11 12:44:40,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:40,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:40,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:40,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:40,614 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-11 12:44:40,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:40,660 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-10-11 12:44:40,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 12:44:40,660 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:40,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:40,661 INFO L225 Difference]: With dead ends: 138 [2020-10-11 12:44:40,662 INFO L226 Difference]: Without dead ends: 136 [2020-10-11 12:44:40,662 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:40,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-11 12:44:40,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-10-11 12:44:40,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-11 12:44:40,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-10-11 12:44:40,666 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-10-11 12:44:40,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:40,666 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-10-11 12:44:40,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:40,666 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-10-11 12:44:40,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:40,667 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:40,667 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:40,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-11 12:44:40,876 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:40,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:40,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 21 times [2020-10-11 12:44:40,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:40,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558283452] [2020-10-11 12:44:40,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:40,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558283452] [2020-10-11 12:44:40,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118146753] [2020-10-11 12:44:40,950 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 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 [2020-10-11 12:44:40,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:40,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:40,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:40,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:41,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:41,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:41,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:41,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271813057] [2020-10-11 12:44:41,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:41,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:41,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:41,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:41,099 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-10-11 12:44:41,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:41,202 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-10-11 12:44:41,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:41,205 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:41,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:41,207 INFO L225 Difference]: With dead ends: 145 [2020-10-11 12:44:41,207 INFO L226 Difference]: Without dead ends: 143 [2020-10-11 12:44:41,207 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:44:41,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-11 12:44:41,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-10-11 12:44:41,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-11 12:44:41,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-10-11 12:44:41,210 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-10-11 12:44:41,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:41,211 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-10-11 12:44:41,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:41,211 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-10-11 12:44:41,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:41,211 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:41,211 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:41,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-11 12:44:41,423 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:41,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:41,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 22 times [2020-10-11 12:44:41,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:41,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173110303] [2020-10-11 12:44:41,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:41,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:41,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173110303] [2020-10-11 12:44:41,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940823326] [2020-10-11 12:44:41,486 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 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 [2020-10-11 12:44:41,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:41,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:41,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:41,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:41,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:41,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:41,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222444563] [2020-10-11 12:44:41,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:41,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:41,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:41,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:41,601 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-10-11 12:44:41,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:41,741 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-11 12:44:41,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:44:41,742 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:41,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:41,743 INFO L225 Difference]: With dead ends: 150 [2020-10-11 12:44:41,743 INFO L226 Difference]: Without dead ends: 148 [2020-10-11 12:44:41,744 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:44:41,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-11 12:44:41,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-10-11 12:44:41,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-11 12:44:41,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-10-11 12:44:41,748 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-10-11 12:44:41,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:41,748 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-10-11 12:44:41,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:41,749 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-10-11 12:44:41,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:41,749 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:41,749 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:41,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:41,950 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:41,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:41,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 23 times [2020-10-11 12:44:41,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:41,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215875209] [2020-10-11 12:44:41,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:42,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215875209] [2020-10-11 12:44:42,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706429634] [2020-10-11 12:44:42,021 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 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 [2020-10-11 12:44:42,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:44:42,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:42,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:42,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:42,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:42,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:42,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:42,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9399828] [2020-10-11 12:44:42,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:42,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:42,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:42,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:42,152 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-10-11 12:44:42,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:42,268 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-10-11 12:44:42,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:44:42,268 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:42,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:42,269 INFO L225 Difference]: With dead ends: 148 [2020-10-11 12:44:42,269 INFO L226 Difference]: Without dead ends: 146 [2020-10-11 12:44:42,270 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:44:42,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-11 12:44:42,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-10-11 12:44:42,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-11 12:44:42,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-11 12:44:42,273 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-11 12:44:42,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:42,273 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-11 12:44:42,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:42,273 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-11 12:44:42,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:42,274 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:42,274 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:42,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-11 12:44:42,484 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:42,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:42,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1442208078, now seen corresponding path program 24 times [2020-10-11 12:44:42,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:42,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282630767] [2020-10-11 12:44:42,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:42,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282630767] [2020-10-11 12:44:42,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265700512] [2020-10-11 12:44:42,566 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 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 [2020-10-11 12:44:42,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:44:42,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:42,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:42,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:42,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:42,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:42,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578120503] [2020-10-11 12:44:42,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:42,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:42,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:42,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:42,693 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-11 12:44:42,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:42,809 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-10-11 12:44:42,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:44:42,810 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:42,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:42,811 INFO L225 Difference]: With dead ends: 149 [2020-10-11 12:44:42,811 INFO L226 Difference]: Without dead ends: 147 [2020-10-11 12:44:42,812 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:44:42,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-11 12:44:42,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-11 12:44:42,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-11 12:44:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-10-11 12:44:42,818 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-10-11 12:44:42,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:42,821 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-10-11 12:44:42,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:42,822 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-10-11 12:44:42,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:42,822 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:42,822 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:43,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:43,033 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:43,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:43,033 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 25 times [2020-10-11 12:44:43,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:43,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162188731] [2020-10-11 12:44:43,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:43,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162188731] [2020-10-11 12:44:43,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402809165] [2020-10-11 12:44:43,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 12:44:43,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:43,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:43,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:43,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:43,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:43,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:43,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4491076] [2020-10-11 12:44:43,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:43,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:43,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:43,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:43,288 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-10-11 12:44:43,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:43,356 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-10-11 12:44:43,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:43,357 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:43,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:43,358 INFO L225 Difference]: With dead ends: 152 [2020-10-11 12:44:43,358 INFO L226 Difference]: Without dead ends: 150 [2020-10-11 12:44:43,359 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-11 12:44:43,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-11 12:44:43,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-10-11 12:44:43,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-11 12:44:43,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-10-11 12:44:43,363 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-10-11 12:44:43,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:43,363 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-10-11 12:44:43,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:43,363 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-10-11 12:44:43,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:43,364 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:43,364 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:43,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-11 12:44:43,572 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:43,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:43,572 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 26 times [2020-10-11 12:44:43,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:43,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288831112] [2020-10-11 12:44:43,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:43,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288831112] [2020-10-11 12:44:43,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840205495] [2020-10-11 12:44:43,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:43,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:43,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:43,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:43,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:43,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:43,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:43,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:43,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777279420] [2020-10-11 12:44:43,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:43,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:43,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:43,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:43,812 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-10-11 12:44:43,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:43,935 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-10-11 12:44:43,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:44:43,935 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:43,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:43,937 INFO L225 Difference]: With dead ends: 153 [2020-10-11 12:44:43,937 INFO L226 Difference]: Without dead ends: 151 [2020-10-11 12:44:43,938 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:44:43,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-11 12:44:43,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-10-11 12:44:43,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-11 12:44:43,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-11 12:44:43,941 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-11 12:44:43,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:43,942 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-11 12:44:43,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:43,942 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-11 12:44:43,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:43,942 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:43,942 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:44,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-11 12:44:44,153 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:44,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:44,153 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 27 times [2020-10-11 12:44:44,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:44,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713085317] [2020-10-11 12:44:44,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:44,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713085317] [2020-10-11 12:44:44,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258794084] [2020-10-11 12:44:44,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:44,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:44,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:44,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:44,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:44,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:44,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:44,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368585966] [2020-10-11 12:44:44,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:44,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:44,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:44,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:44,342 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-11 12:44:44,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:44,488 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-11 12:44:44,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:44:44,489 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:44,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:44,490 INFO L225 Difference]: With dead ends: 156 [2020-10-11 12:44:44,491 INFO L226 Difference]: Without dead ends: 154 [2020-10-11 12:44:44,491 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:44:44,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-11 12:44:44,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-11 12:44:44,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-11 12:44:44,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-10-11 12:44:44,495 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-10-11 12:44:44,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:44,495 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-10-11 12:44:44,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:44,495 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-10-11 12:44:44,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:44,496 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:44,496 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:44,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-11 12:44:44,704 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:44,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:44,705 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 28 times [2020-10-11 12:44:44,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:44,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102592817] [2020-10-11 12:44:44,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:44,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102592817] [2020-10-11 12:44:44,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066187284] [2020-10-11 12:44:44,782 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 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 [2020-10-11 12:44:44,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:44,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:44,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:44,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:44,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:44,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:44,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720082900] [2020-10-11 12:44:44,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:44,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:44,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:44,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:44,907 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-10-11 12:44:44,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:44,988 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-11 12:44:44,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:44:44,989 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:44,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:44,990 INFO L225 Difference]: With dead ends: 148 [2020-10-11 12:44:44,990 INFO L226 Difference]: Without dead ends: 146 [2020-10-11 12:44:44,991 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:44:44,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-11 12:44:44,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-10-11 12:44:44,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-11 12:44:44,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-11 12:44:44,994 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-11 12:44:44,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:44,995 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-11 12:44:44,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:44,995 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-11 12:44:44,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:44,995 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:44,995 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:45,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-11 12:44:45,205 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:45,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:45,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 29 times [2020-10-11 12:44:45,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:45,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150663131] [2020-10-11 12:44:45,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:45,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150663131] [2020-10-11 12:44:45,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251265460] [2020-10-11 12:44:45,266 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 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 [2020-10-11 12:44:45,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:45,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:45,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:45,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:45,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:45,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:45,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661066508] [2020-10-11 12:44:45,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:45,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:45,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:45,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:45,401 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-11 12:44:45,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:45,560 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-10-11 12:44:45,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:44:45,561 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:45,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:45,562 INFO L225 Difference]: With dead ends: 157 [2020-10-11 12:44:45,562 INFO L226 Difference]: Without dead ends: 155 [2020-10-11 12:44:45,562 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:44:45,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-11 12:44:45,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-10-11 12:44:45,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-11 12:44:45,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-10-11 12:44:45,565 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-10-11 12:44:45,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:45,566 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-10-11 12:44:45,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:45,566 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-10-11 12:44:45,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:45,567 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:45,567 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:45,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:45,776 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:45,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:45,777 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 30 times [2020-10-11 12:44:45,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:45,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30580973] [2020-10-11 12:44:45,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:45,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:45,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30580973] [2020-10-11 12:44:45,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285949334] [2020-10-11 12:44:45,840 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 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 [2020-10-11 12:44:45,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:44:45,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:45,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:45,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:46,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:46,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:46,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446885286] [2020-10-11 12:44:46,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:46,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:46,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:46,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:46,060 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 13 states. [2020-10-11 12:44:46,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:46,189 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-10-11 12:44:46,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:44:46,190 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:46,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:46,191 INFO L225 Difference]: With dead ends: 149 [2020-10-11 12:44:46,192 INFO L226 Difference]: Without dead ends: 147 [2020-10-11 12:44:46,192 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:44:46,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-11 12:44:46,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-10-11 12:44:46,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-11 12:44:46,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-11 12:44:46,198 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-11 12:44:46,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:46,199 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-11 12:44:46,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:46,199 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-11 12:44:46,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:46,200 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:46,200 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:46,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-11 12:44:46,412 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:46,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:46,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2099754286, now seen corresponding path program 31 times [2020-10-11 12:44:46,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:46,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881715174] [2020-10-11 12:44:46,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:46,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:46,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881715174] [2020-10-11 12:44:46,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181873517] [2020-10-11 12:44:46,492 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 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 [2020-10-11 12:44:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:46,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:46,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:46,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:46,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:46,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:46,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020994834] [2020-10-11 12:44:46,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:46,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:46,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:46,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:46,679 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-11 12:44:46,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:46,927 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-10-11 12:44:46,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:44:46,931 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:46,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:46,932 INFO L225 Difference]: With dead ends: 164 [2020-10-11 12:44:46,932 INFO L226 Difference]: Without dead ends: 159 [2020-10-11 12:44:46,932 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:44:46,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-11 12:44:46,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-11 12:44:46,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-11 12:44:46,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-10-11 12:44:46,934 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-10-11 12:44:46,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:46,935 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-10-11 12:44:46,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:46,935 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-10-11 12:44:46,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:46,935 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:46,935 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:47,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-11 12:44:47,139 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:47,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:47,139 INFO L82 PathProgramCache]: Analyzing trace with hash 2099761757, now seen corresponding path program 32 times [2020-10-11 12:44:47,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:47,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340429130] [2020-10-11 12:44:47,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:47,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:47,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340429130] [2020-10-11 12:44:47,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402686813] [2020-10-11 12:44:47,194 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:47,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:47,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:47,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:47,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:47,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:47,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:47,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433155340] [2020-10-11 12:44:47,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:47,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:47,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:47,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:47,338 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-10-11 12:44:47,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:47,505 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-11 12:44:47,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:44:47,506 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:47,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:47,507 INFO L225 Difference]: With dead ends: 156 [2020-10-11 12:44:47,507 INFO L226 Difference]: Without dead ends: 154 [2020-10-11 12:44:47,508 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:44:47,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-11 12:44:47,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-11 12:44:47,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-11 12:44:47,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-11 12:44:47,511 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-11 12:44:47,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:47,512 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-11 12:44:47,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:47,512 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-11 12:44:47,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:47,512 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:47,513 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:47,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:47,722 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:47,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:47,722 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 33 times [2020-10-11 12:44:47,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:47,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862419658] [2020-10-11 12:44:47,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:47,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862419658] [2020-10-11 12:44:47,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282317177] [2020-10-11 12:44:47,775 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:47,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:47,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:47,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:47,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:47,902 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:47,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:47,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:47,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:47,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940614255] [2020-10-11 12:44:47,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:47,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:47,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:47,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:47,934 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-11 12:44:48,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:48,278 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-10-11 12:44:48,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:44:48,279 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:48,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:48,280 INFO L225 Difference]: With dead ends: 176 [2020-10-11 12:44:48,280 INFO L226 Difference]: Without dead ends: 171 [2020-10-11 12:44:48,280 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:44:48,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-11 12:44:48,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-10-11 12:44:48,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-11 12:44:48,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-11 12:44:48,284 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-11 12:44:48,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:48,284 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-11 12:44:48,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:48,284 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-11 12:44:48,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:48,285 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:48,285 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:48,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-11 12:44:48,489 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:48,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:48,489 INFO L82 PathProgramCache]: Analyzing trace with hash 2099784077, now seen corresponding path program 34 times [2020-10-11 12:44:48,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:48,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832216188] [2020-10-11 12:44:48,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:48,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832216188] [2020-10-11 12:44:48,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011461604] [2020-10-11 12:44:48,550 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:48,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:48,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:48,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:48,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:48,669 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:48,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:48,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:48,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:48,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844964924] [2020-10-11 12:44:48,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:48,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:48,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:48,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:48,698 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-11 12:44:48,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:48,946 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-10-11 12:44:48,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:44:48,946 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:48,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:48,948 INFO L225 Difference]: With dead ends: 166 [2020-10-11 12:44:48,948 INFO L226 Difference]: Without dead ends: 161 [2020-10-11 12:44:48,948 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:44:48,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-11 12:44:48,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-10-11 12:44:48,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-11 12:44:48,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-10-11 12:44:48,952 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-10-11 12:44:48,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:48,952 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-10-11 12:44:48,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:48,953 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-10-11 12:44:48,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:48,953 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:48,953 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:49,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:49,165 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:49,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:49,165 INFO L82 PathProgramCache]: Analyzing trace with hash 2099992397, now seen corresponding path program 35 times [2020-10-11 12:44:49,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:49,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014955868] [2020-10-11 12:44:49,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:49,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014955868] [2020-10-11 12:44:49,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600730540] [2020-10-11 12:44:49,215 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:49,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:49,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:49,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:49,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:49,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:49,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:49,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190666057] [2020-10-11 12:44:49,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:49,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:49,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:49,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:49,340 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-10-11 12:44:49,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:49,516 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-10-11 12:44:49,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:44:49,516 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:49,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:49,517 INFO L225 Difference]: With dead ends: 163 [2020-10-11 12:44:49,518 INFO L226 Difference]: Without dead ends: 161 [2020-10-11 12:44:49,518 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:44:49,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-11 12:44:49,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-10-11 12:44:49,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-11 12:44:49,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-10-11 12:44:49,521 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-10-11 12:44:49,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:49,521 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-10-11 12:44:49,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:49,522 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-10-11 12:44:49,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:49,522 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:49,522 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:49,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-11 12:44:49,732 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:49,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:49,732 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 36 times [2020-10-11 12:44:49,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:49,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071729583] [2020-10-11 12:44:49,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:49,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:49,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071729583] [2020-10-11 12:44:49,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183849817] [2020-10-11 12:44:49,784 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:49,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:44:49,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:49,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:49,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:49,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:49,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:49,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069678942] [2020-10-11 12:44:49,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:49,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:49,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:49,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:49,932 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-10-11 12:44:50,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:50,173 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-10-11 12:44:50,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:44:50,174 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:50,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:50,175 INFO L225 Difference]: With dead ends: 170 [2020-10-11 12:44:50,175 INFO L226 Difference]: Without dead ends: 168 [2020-10-11 12:44:50,176 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-10-11 12:44:50,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-11 12:44:50,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-10-11 12:44:50,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-11 12:44:50,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-10-11 12:44:50,179 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-10-11 12:44:50,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:50,179 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-10-11 12:44:50,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:50,180 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-10-11 12:44:50,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:50,180 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:50,180 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:50,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:50,387 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:50,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:50,387 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 37 times [2020-10-11 12:44:50,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:50,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401595538] [2020-10-11 12:44:50,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:50,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401595538] [2020-10-11 12:44:50,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062231031] [2020-10-11 12:44:50,445 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:50,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:50,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:50,555 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:50,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:50,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:50,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516891636] [2020-10-11 12:44:50,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:50,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:50,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:50,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:50,565 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-10-11 12:44:50,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:50,860 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-10-11 12:44:50,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:44:50,860 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:50,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:50,862 INFO L225 Difference]: With dead ends: 177 [2020-10-11 12:44:50,862 INFO L226 Difference]: Without dead ends: 172 [2020-10-11 12:44:50,862 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:44:50,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-11 12:44:50,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-11 12:44:50,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-11 12:44:50,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-10-11 12:44:50,866 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-10-11 12:44:50,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:50,866 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-10-11 12:44:50,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:50,866 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-10-11 12:44:50,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:50,867 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:50,867 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:51,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-11 12:44:51,077 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:51,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:51,078 INFO L82 PathProgramCache]: Analyzing trace with hash 2100677807, now seen corresponding path program 38 times [2020-10-11 12:44:51,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:51,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451421784] [2020-10-11 12:44:51,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:51,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451421784] [2020-10-11 12:44:51,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328187260] [2020-10-11 12:44:51,130 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:51,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:51,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:51,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:51,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:51,245 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:51,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:51,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:51,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165915395] [2020-10-11 12:44:51,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:51,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:51,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:51,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:51,260 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-10-11 12:44:51,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:51,619 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-10-11 12:44:51,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:44:51,620 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:51,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:51,621 INFO L225 Difference]: With dead ends: 190 [2020-10-11 12:44:51,621 INFO L226 Difference]: Without dead ends: 182 [2020-10-11 12:44:51,622 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:44:51,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-11 12:44:51,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-10-11 12:44:51,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-11 12:44:51,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-10-11 12:44:51,626 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-10-11 12:44:51,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:51,627 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-10-11 12:44:51,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:51,627 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-10-11 12:44:51,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:51,627 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:51,627 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:51,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-11 12:44:51,832 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:51,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:51,832 INFO L82 PathProgramCache]: Analyzing trace with hash 2100706637, now seen corresponding path program 39 times [2020-10-11 12:44:51,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:51,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563740115] [2020-10-11 12:44:51,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:51,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563740115] [2020-10-11 12:44:51,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496732849] [2020-10-11 12:44:51,902 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:51,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:44:51,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:51,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:51,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:52,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:52,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:52,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:52,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951066563] [2020-10-11 12:44:52,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:52,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:52,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:52,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:52,020 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-10-11 12:44:52,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:52,367 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-10-11 12:44:52,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:44:52,368 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:52,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:52,369 INFO L225 Difference]: With dead ends: 180 [2020-10-11 12:44:52,369 INFO L226 Difference]: Without dead ends: 175 [2020-10-11 12:44:52,369 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:44:52,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-11 12:44:52,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-10-11 12:44:52,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-11 12:44:52,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-10-11 12:44:52,372 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-10-11 12:44:52,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:52,373 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-10-11 12:44:52,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:52,373 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-10-11 12:44:52,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:52,373 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:52,373 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:52,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-11 12:44:52,574 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:52,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:52,575 INFO L82 PathProgramCache]: Analyzing trace with hash 2107142237, now seen corresponding path program 40 times [2020-10-11 12:44:52,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:52,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229009020] [2020-10-11 12:44:52,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:52,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:52,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229009020] [2020-10-11 12:44:52,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488727814] [2020-10-11 12:44:52,639 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:52,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:52,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:52,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:52,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:52,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:52,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:52,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672242755] [2020-10-11 12:44:52,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:52,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:52,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:52,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:52,767 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-10-11 12:44:52,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:52,897 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-10-11 12:44:52,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:44:52,898 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:52,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:52,899 INFO L225 Difference]: With dead ends: 164 [2020-10-11 12:44:52,899 INFO L226 Difference]: Without dead ends: 162 [2020-10-11 12:44:52,899 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:44:52,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-11 12:44:52,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-10-11 12:44:52,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-11 12:44:52,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-10-11 12:44:52,902 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-10-11 12:44:52,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:52,903 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-10-11 12:44:52,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:52,903 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-10-11 12:44:52,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:52,903 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:52,903 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:53,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-11 12:44:53,104 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:53,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:53,105 INFO L82 PathProgramCache]: Analyzing trace with hash 2107143198, now seen corresponding path program 41 times [2020-10-11 12:44:53,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:53,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565237656] [2020-10-11 12:44:53,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:53,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565237656] [2020-10-11 12:44:53,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495069537] [2020-10-11 12:44:53,166 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:53,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:53,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:53,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:53,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:53,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:53,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:53,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172032091] [2020-10-11 12:44:53,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:53,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:53,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:53,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:53,296 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-10-11 12:44:53,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:53,452 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-10-11 12:44:53,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:44:53,453 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:53,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:53,454 INFO L225 Difference]: With dead ends: 161 [2020-10-11 12:44:53,454 INFO L226 Difference]: Without dead ends: 159 [2020-10-11 12:44:53,455 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:44:53,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-11 12:44:53,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-10-11 12:44:53,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-11 12:44:53,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-10-11 12:44:53,458 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-10-11 12:44:53,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:53,458 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-10-11 12:44:53,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:53,458 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-10-11 12:44:53,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:53,458 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:53,459 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:53,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-11 12:44:53,661 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:53,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:53,661 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 42 times [2020-10-11 12:44:53,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:53,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221232840] [2020-10-11 12:44:53,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:53,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221232840] [2020-10-11 12:44:53,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865395426] [2020-10-11 12:44:53,718 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:53,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:44:53,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:53,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:53,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:53,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:53,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:53,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748044660] [2020-10-11 12:44:53,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:53,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:53,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:53,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:53,887 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-10-11 12:44:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:54,138 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-10-11 12:44:54,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:44:54,139 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:54,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:54,141 INFO L225 Difference]: With dead ends: 165 [2020-10-11 12:44:54,141 INFO L226 Difference]: Without dead ends: 163 [2020-10-11 12:44:54,141 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-10-11 12:44:54,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-11 12:44:54,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-10-11 12:44:54,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-11 12:44:54,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-10-11 12:44:54,147 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-10-11 12:44:54,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:54,147 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-10-11 12:44:54,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:54,147 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-10-11 12:44:54,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:54,148 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:54,148 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:54,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-11 12:44:54,361 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:54,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:54,362 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698988, now seen corresponding path program 43 times [2020-10-11 12:44:54,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:54,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791453494] [2020-10-11 12:44:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:54,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:54,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791453494] [2020-10-11 12:44:54,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598021501] [2020-10-11 12:44:54,418 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:54,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:54,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:54,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:54,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:54,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:54,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411731857] [2020-10-11 12:44:54,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:54,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:54,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:54,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:54,551 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-10-11 12:44:54,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:54,759 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-10-11 12:44:54,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:44:54,759 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:54,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:54,761 INFO L225 Difference]: With dead ends: 167 [2020-10-11 12:44:54,762 INFO L226 Difference]: Without dead ends: 165 [2020-10-11 12:44:54,762 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-11 12:44:54,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-11 12:44:54,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-10-11 12:44:54,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-11 12:44:54,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-11 12:44:54,765 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-11 12:44:54,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:54,766 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-11 12:44:54,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:54,766 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-11 12:44:54,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:54,766 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:54,766 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:54,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:54,970 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:54,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:54,971 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 44 times [2020-10-11 12:44:54,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:54,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201645258] [2020-10-11 12:44:54,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:55,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201645258] [2020-10-11 12:44:55,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106186153] [2020-10-11 12:44:55,026 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:55,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:55,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:55,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:55,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:55,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:55,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:55,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:55,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070591511] [2020-10-11 12:44:55,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:55,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:55,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:55,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:55,169 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-11 12:44:55,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:55,412 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-10-11 12:44:55,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:44:55,413 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:55,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:55,414 INFO L225 Difference]: With dead ends: 168 [2020-10-11 12:44:55,414 INFO L226 Difference]: Without dead ends: 166 [2020-10-11 12:44:55,415 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:44:55,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-11 12:44:55,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-10-11 12:44:55,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-11 12:44:55,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-11 12:44:55,417 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-11 12:44:55,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:55,418 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-11 12:44:55,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:55,418 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-11 12:44:55,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:55,418 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:55,418 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:55,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:55,619 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:55,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:55,620 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 45 times [2020-10-11 12:44:55,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:55,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253475420] [2020-10-11 12:44:55,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:55,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253475420] [2020-10-11 12:44:55,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90335192] [2020-10-11 12:44:55,669 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:55,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:55,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:55,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:55,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:55,775 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:55,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:55,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:55,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851597904] [2020-10-11 12:44:55,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:55,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:55,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:55,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:55,784 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-11 12:44:55,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:55,979 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-10-11 12:44:55,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:44:55,979 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:55,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:55,981 INFO L225 Difference]: With dead ends: 160 [2020-10-11 12:44:55,981 INFO L226 Difference]: Without dead ends: 155 [2020-10-11 12:44:55,981 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:44:55,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-11 12:44:55,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-11 12:44:55,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-11 12:44:55,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-11 12:44:55,985 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-11 12:44:55,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:55,985 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-11 12:44:55,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:55,985 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-11 12:44:55,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:55,986 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:55,986 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:56,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:56,196 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:56,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:56,196 INFO L82 PathProgramCache]: Analyzing trace with hash 2128383437, now seen corresponding path program 46 times [2020-10-11 12:44:56,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:56,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742070517] [2020-10-11 12:44:56,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:56,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742070517] [2020-10-11 12:44:56,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017417508] [2020-10-11 12:44:56,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:56,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:56,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:56,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:56,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:56,365 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:56,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:56,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:56,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774107440] [2020-10-11 12:44:56,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:56,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:56,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:56,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:56,401 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-11 12:44:56,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:56,742 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-10-11 12:44:56,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:44:56,743 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:56,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:56,744 INFO L225 Difference]: With dead ends: 189 [2020-10-11 12:44:56,744 INFO L226 Difference]: Without dead ends: 181 [2020-10-11 12:44:56,745 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:44:56,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-11 12:44:56,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-10-11 12:44:56,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-11 12:44:56,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-11 12:44:56,748 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-11 12:44:56,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:56,748 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-11 12:44:56,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:56,748 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-11 12:44:56,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:56,749 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:56,749 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:56,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:56,949 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:56,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:56,950 INFO L82 PathProgramCache]: Analyzing trace with hash 2128390908, now seen corresponding path program 47 times [2020-10-11 12:44:56,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:56,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495072395] [2020-10-11 12:44:56,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:56,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:57,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:57,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495072395] [2020-10-11 12:44:57,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580637538] [2020-10-11 12:44:57,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:57,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:57,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:57,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:57,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:57,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:57,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:57,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054963872] [2020-10-11 12:44:57,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:57,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:57,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:57,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:57,127 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-11 12:44:57,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:57,364 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-10-11 12:44:57,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:44:57,365 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:57,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:57,366 INFO L225 Difference]: With dead ends: 169 [2020-10-11 12:44:57,367 INFO L226 Difference]: Without dead ends: 167 [2020-10-11 12:44:57,367 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:44:57,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-11 12:44:57,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-10-11 12:44:57,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-11 12:44:57,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-11 12:44:57,370 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-11 12:44:57,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:57,370 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-11 12:44:57,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:57,370 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-11 12:44:57,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:57,371 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:57,371 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:57,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-11 12:44:57,572 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:57,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:57,572 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 48 times [2020-10-11 12:44:57,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:57,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802775941] [2020-10-11 12:44:57,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:57,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802775941] [2020-10-11 12:44:57,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713741522] [2020-10-11 12:44:57,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:57,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:44:57,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:57,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:57,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:57,792 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:57,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:57,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:57,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699048543] [2020-10-11 12:44:57,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:57,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:57,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:57,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:57,801 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-11 12:44:58,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:58,137 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-10-11 12:44:58,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:44:58,138 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:58,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:58,139 INFO L225 Difference]: With dead ends: 192 [2020-10-11 12:44:58,139 INFO L226 Difference]: Without dead ends: 184 [2020-10-11 12:44:58,140 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:44:58,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-11 12:44:58,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-10-11 12:44:58,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-11 12:44:58,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-10-11 12:44:58,143 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-10-11 12:44:58,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:58,143 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-10-11 12:44:58,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:58,144 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-10-11 12:44:58,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:58,144 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:58,144 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:58,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:58,352 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:58,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:58,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2128413228, now seen corresponding path program 49 times [2020-10-11 12:44:58,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:58,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500002367] [2020-10-11 12:44:58,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:58,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500002367] [2020-10-11 12:44:58,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764812921] [2020-10-11 12:44:58,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:58,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:58,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:58,510 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:58,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:58,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:58,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:58,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765511373] [2020-10-11 12:44:58,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:58,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:58,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:58,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:58,522 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-10-11 12:44:58,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:58,845 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-10-11 12:44:58,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:44:58,845 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:58,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:58,847 INFO L225 Difference]: With dead ends: 180 [2020-10-11 12:44:58,847 INFO L226 Difference]: Without dead ends: 175 [2020-10-11 12:44:58,847 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:44:58,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-11 12:44:58,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-10-11 12:44:58,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-11 12:44:58,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-11 12:44:58,851 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-11 12:44:58,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:58,851 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-11 12:44:58,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:58,851 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-11 12:44:58,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:58,851 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:58,852 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:59,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-11 12:44:59,054 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:59,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:59,054 INFO L82 PathProgramCache]: Analyzing trace with hash 609848181, now seen corresponding path program 5 times [2020-10-11 12:44:59,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:59,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950397539] [2020-10-11 12:44:59,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:59,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950397539] [2020-10-11 12:44:59,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706089819] [2020-10-11 12:44:59,124 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:59,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:44:59,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:59,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:44:59,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:59,261 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:59,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:59,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:59,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-11 12:44:59,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006919382] [2020-10-11 12:44:59,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 12:44:59,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:59,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 12:44:59,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:44:59,286 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-11 12:44:59,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:59,429 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-11 12:44:59,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:44:59,430 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-11 12:44:59,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:59,431 INFO L225 Difference]: With dead ends: 164 [2020-10-11 12:44:59,431 INFO L226 Difference]: Without dead ends: 159 [2020-10-11 12:44:59,432 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-11 12:44:59,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-11 12:44:59,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-11 12:44:59,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-11 12:44:59,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-11 12:44:59,435 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-11 12:44:59,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:59,435 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-11 12:44:59,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 12:44:59,436 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-11 12:44:59,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:59,436 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:59,436 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:59,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:59,637 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:59,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:59,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 15 times [2020-10-11 12:44:59,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:59,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77738594] [2020-10-11 12:44:59,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:59,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77738594] [2020-10-11 12:44:59,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994202866] [2020-10-11 12:44:59,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:59,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:44:59,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:59,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:44:59,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:59,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:59,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:44:59,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232609048] [2020-10-11 12:44:59,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:44:59,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:59,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:44:59,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:44:59,904 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-11 12:44:59,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:59,954 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-11 12:44:59,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:59,955 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-11 12:44:59,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:59,956 INFO L225 Difference]: With dead ends: 156 [2020-10-11 12:44:59,956 INFO L226 Difference]: Without dead ends: 153 [2020-10-11 12:44:59,957 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:44:59,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-11 12:44:59,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-10-11 12:44:59,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-11 12:44:59,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-11 12:44:59,962 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-11 12:44:59,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:59,963 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-11 12:44:59,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:44:59,963 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-11 12:44:59,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:59,963 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:59,963 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:00,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-11 12:45:00,169 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:00,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:00,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1985246760, now seen corresponding path program 16 times [2020-10-11 12:45:00,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:00,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79512270] [2020-10-11 12:45:00,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:00,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79512270] [2020-10-11 12:45:00,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541005955] [2020-10-11 12:45:00,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:00,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:00,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:00,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:00,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:00,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:00,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:00,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:00,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605414590] [2020-10-11 12:45:00,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:00,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:00,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:00,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:00,426 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-11 12:45:00,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:00,483 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-10-11 12:45:00,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:45:00,483 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-11 12:45:00,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:00,485 INFO L225 Difference]: With dead ends: 170 [2020-10-11 12:45:00,485 INFO L226 Difference]: Without dead ends: 167 [2020-10-11 12:45:00,485 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:45:00,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-11 12:45:00,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-10-11 12:45:00,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-11 12:45:00,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-11 12:45:00,488 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-11 12:45:00,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:00,488 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-11 12:45:00,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:00,489 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-11 12:45:00,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:45:00,489 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:00,489 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:00,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:00,697 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:00,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:00,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1644785416, now seen corresponding path program 17 times [2020-10-11 12:45:00,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:00,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258409174] [2020-10-11 12:45:00,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:00,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258409174] [2020-10-11 12:45:00,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460077028] [2020-10-11 12:45:00,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:00,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:45:00,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:00,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:00,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:00,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:00,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:00,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849239683] [2020-10-11 12:45:00,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:00,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:00,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:00,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:00,967 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-11 12:45:01,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:01,048 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-10-11 12:45:01,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:45:01,049 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-11 12:45:01,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:01,050 INFO L225 Difference]: With dead ends: 169 [2020-10-11 12:45:01,050 INFO L226 Difference]: Without dead ends: 166 [2020-10-11 12:45:01,051 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:45:01,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-11 12:45:01,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-10-11 12:45:01,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-11 12:45:01,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-10-11 12:45:01,053 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-10-11 12:45:01,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:01,054 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-10-11 12:45:01,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:01,054 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-10-11 12:45:01,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:45:01,054 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:01,054 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:01,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:01,263 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:01,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:01,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1623335896, now seen corresponding path program 18 times [2020-10-11 12:45:01,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:01,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661014355] [2020-10-11 12:45:01,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:01,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:01,344 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:01,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661014355] [2020-10-11 12:45:01,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674317675] [2020-10-11 12:45:01,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:01,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:45:01,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:01,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:01,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:01,498 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:01,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:01,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:01,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780079970] [2020-10-11 12:45:01,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:01,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:01,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:01,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:01,500 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-10-11 12:45:01,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:01,599 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-10-11 12:45:01,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:45:01,599 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-11 12:45:01,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:01,601 INFO L225 Difference]: With dead ends: 168 [2020-10-11 12:45:01,601 INFO L226 Difference]: Without dead ends: 165 [2020-10-11 12:45:01,601 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:45:01,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-11 12:45:01,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-11 12:45:01,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-11 12:45:01,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-10-11 12:45:01,604 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-10-11 12:45:01,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:01,605 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-10-11 12:45:01,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:01,605 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-10-11 12:45:01,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:45:01,605 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:01,605 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:01,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-11 12:45:01,806 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:01,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:01,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1622643976, now seen corresponding path program 19 times [2020-10-11 12:45:01,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:01,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199805369] [2020-10-11 12:45:01,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:01,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199805369] [2020-10-11 12:45:01,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886835838] [2020-10-11 12:45:01,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:01,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:01,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:02,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:02,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:02,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079874936] [2020-10-11 12:45:02,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:02,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:02,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:02,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:02,044 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-10-11 12:45:02,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:02,172 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-10-11 12:45:02,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:45:02,173 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-11 12:45:02,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:02,174 INFO L225 Difference]: With dead ends: 167 [2020-10-11 12:45:02,174 INFO L226 Difference]: Without dead ends: 164 [2020-10-11 12:45:02,174 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:45:02,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-11 12:45:02,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-10-11 12:45:02,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-11 12:45:02,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-10-11 12:45:02,178 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-10-11 12:45:02,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:02,179 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-10-11 12:45:02,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:02,179 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-10-11 12:45:02,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:45:02,179 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:02,179 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:02,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:02,385 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:02,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:02,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1622621656, now seen corresponding path program 20 times [2020-10-11 12:45:02,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:02,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886567015] [2020-10-11 12:45:02,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:02,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886567015] [2020-10-11 12:45:02,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479251363] [2020-10-11 12:45:02,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:02,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:02,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:02,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:02,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:02,588 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:45:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:02,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:02,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:02,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314265584] [2020-10-11 12:45:02,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:02,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:02,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:02,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:02,605 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-10-11 12:45:02,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:02,772 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-10-11 12:45:02,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:02,773 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-11 12:45:02,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:02,774 INFO L225 Difference]: With dead ends: 176 [2020-10-11 12:45:02,774 INFO L226 Difference]: Without dead ends: 170 [2020-10-11 12:45:02,775 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:45:02,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-11 12:45:02,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-10-11 12:45:02,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-11 12:45:02,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-11 12:45:02,779 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-11 12:45:02,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:02,779 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-11 12:45:02,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:02,780 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-11 12:45:02,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:02,781 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:02,781 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:02,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:02,992 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:02,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:02,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1730118241, now seen corresponding path program 50 times [2020-10-11 12:45:02,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:02,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621359393] [2020-10-11 12:45:02,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:03,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:03,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:03,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621359393] [2020-10-11 12:45:03,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647827662] [2020-10-11 12:45:03,113 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:03,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:03,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:03,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:03,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:03,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:03,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:03,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320229878] [2020-10-11 12:45:03,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:03,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:03,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:03,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:03,350 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-11 12:45:03,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:03,418 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-10-11 12:45:03,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:45:03,419 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:03,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:03,421 INFO L225 Difference]: With dead ends: 163 [2020-10-11 12:45:03,421 INFO L226 Difference]: Without dead ends: 161 [2020-10-11 12:45:03,421 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:03,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-11 12:45:03,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-10-11 12:45:03,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-11 12:45:03,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-10-11 12:45:03,426 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-10-11 12:45:03,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:03,427 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-10-11 12:45:03,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:03,427 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-10-11 12:45:03,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:03,428 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:03,428 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:03,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-10-11 12:45:03,641 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:03,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:03,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 51 times [2020-10-11 12:45:03,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:03,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290793118] [2020-10-11 12:45:03,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:03,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:03,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:03,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290793118] [2020-10-11 12:45:03,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252667476] [2020-10-11 12:45:03,768 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:03,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:45:03,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:03,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:03,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:03,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:03,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:03,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:03,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986250740] [2020-10-11 12:45:03,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:03,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:03,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:03,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:03,932 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-10-11 12:45:04,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:04,078 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-10-11 12:45:04,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:45:04,079 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:04,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:04,080 INFO L225 Difference]: With dead ends: 172 [2020-10-11 12:45:04,080 INFO L226 Difference]: Without dead ends: 170 [2020-10-11 12:45:04,081 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:45:04,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-11 12:45:04,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-11 12:45:04,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-11 12:45:04,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-11 12:45:04,092 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-11 12:45:04,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:04,092 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-11 12:45:04,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:04,092 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-11 12:45:04,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:04,093 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:04,093 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:04,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:04,303 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:04,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:04,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 52 times [2020-10-11 12:45:04,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:04,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236680192] [2020-10-11 12:45:04,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:04,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:04,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236680192] [2020-10-11 12:45:04,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167350491] [2020-10-11 12:45:04,396 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:04,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:04,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:04,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:04,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:04,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:04,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:04,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634484752] [2020-10-11 12:45:04,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:04,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:04,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:04,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:04,662 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-11 12:45:04,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:04,849 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-11 12:45:04,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:45:04,850 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:04,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:04,851 INFO L225 Difference]: With dead ends: 179 [2020-10-11 12:45:04,851 INFO L226 Difference]: Without dead ends: 177 [2020-10-11 12:45:04,852 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-10-11 12:45:04,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-11 12:45:04,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-10-11 12:45:04,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-11 12:45:04,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-10-11 12:45:04,855 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-10-11 12:45:04,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:04,856 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-10-11 12:45:04,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:04,856 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-10-11 12:45:04,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:04,857 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:04,857 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:05,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-11 12:45:05,067 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:05,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:05,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 53 times [2020-10-11 12:45:05,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:05,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752801252] [2020-10-11 12:45:05,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:05,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:05,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752801252] [2020-10-11 12:45:05,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198804721] [2020-10-11 12:45:05,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:05,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:05,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:05,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:05,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:05,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:05,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:05,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933814818] [2020-10-11 12:45:05,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:05,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:05,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:05,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:05,310 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-10-11 12:45:05,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:05,491 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-11 12:45:05,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:45:05,492 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:05,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:05,493 INFO L225 Difference]: With dead ends: 179 [2020-10-11 12:45:05,494 INFO L226 Difference]: Without dead ends: 177 [2020-10-11 12:45:05,494 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:45:05,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-11 12:45:05,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-11 12:45:05,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-11 12:45:05,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-11 12:45:05,497 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-11 12:45:05,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:05,497 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-11 12:45:05,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:05,497 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-11 12:45:05,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:05,498 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:05,498 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:05,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-11 12:45:05,707 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:05,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:05,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 54 times [2020-10-11 12:45:05,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:05,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151169720] [2020-10-11 12:45:05,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:05,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151169720] [2020-10-11 12:45:05,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628719481] [2020-10-11 12:45:05,783 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:05,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:45:05,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:05,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:05,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:05,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:05,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:05,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545331327] [2020-10-11 12:45:05,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:05,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:05,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:05,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:05,918 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-11 12:45:06,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:06,109 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-10-11 12:45:06,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:45:06,109 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:06,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:06,111 INFO L225 Difference]: With dead ends: 184 [2020-10-11 12:45:06,111 INFO L226 Difference]: Without dead ends: 182 [2020-10-11 12:45:06,111 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:45:06,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-11 12:45:06,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-10-11 12:45:06,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-11 12:45:06,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-10-11 12:45:06,114 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-10-11 12:45:06,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:06,114 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-10-11 12:45:06,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:06,114 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-10-11 12:45:06,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:06,114 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:06,114 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:06,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-11 12:45:06,315 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:06,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:06,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 55 times [2020-10-11 12:45:06,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:06,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380305043] [2020-10-11 12:45:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:06,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380305043] [2020-10-11 12:45:06,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715516817] [2020-10-11 12:45:06,393 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:06,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:06,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:06,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:06,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:06,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018593416] [2020-10-11 12:45:06,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:06,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:06,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:06,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:06,554 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-10-11 12:45:06,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:06,752 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-10-11 12:45:06,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:45:06,753 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:06,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:06,755 INFO L225 Difference]: With dead ends: 179 [2020-10-11 12:45:06,755 INFO L226 Difference]: Without dead ends: 177 [2020-10-11 12:45:06,755 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:45:06,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-11 12:45:06,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-11 12:45:06,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-11 12:45:06,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-11 12:45:06,758 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-11 12:45:06,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:06,758 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-11 12:45:06,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:06,758 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-11 12:45:06,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:06,759 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:06,759 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:06,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:06,959 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:06,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:06,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 56 times [2020-10-11 12:45:06,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:06,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770515176] [2020-10-11 12:45:06,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:07,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770515176] [2020-10-11 12:45:07,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117120395] [2020-10-11 12:45:07,051 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:07,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:07,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:07,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:07,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:07,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:07,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:07,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641961625] [2020-10-11 12:45:07,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:07,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:07,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:07,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:07,203 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-11 12:45:07,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:07,354 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-10-11 12:45:07,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:45:07,354 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:07,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:07,356 INFO L225 Difference]: With dead ends: 176 [2020-10-11 12:45:07,356 INFO L226 Difference]: Without dead ends: 174 [2020-10-11 12:45:07,357 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-11 12:45:07,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-11 12:45:07,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-10-11 12:45:07,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-11 12:45:07,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-10-11 12:45:07,360 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-10-11 12:45:07,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:07,360 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-10-11 12:45:07,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:07,361 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-10-11 12:45:07,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:07,361 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:07,367 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:07,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:07,569 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:07,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:07,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 57 times [2020-10-11 12:45:07,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:07,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431093317] [2020-10-11 12:45:07,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:07,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:07,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431093317] [2020-10-11 12:45:07,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753088541] [2020-10-11 12:45:07,672 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:07,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:45:07,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:07,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:07,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:07,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:07,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:07,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:07,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941419964] [2020-10-11 12:45:07,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:07,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:07,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:07,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:07,908 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-10-11 12:45:08,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:08,123 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-11 12:45:08,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:45:08,124 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:08,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:08,125 INFO L225 Difference]: With dead ends: 185 [2020-10-11 12:45:08,126 INFO L226 Difference]: Without dead ends: 183 [2020-10-11 12:45:08,126 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:45:08,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-11 12:45:08,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-10-11 12:45:08,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-11 12:45:08,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-10-11 12:45:08,129 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-10-11 12:45:08,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:08,129 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-10-11 12:45:08,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:08,129 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-10-11 12:45:08,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:08,130 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:08,130 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:08,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:08,332 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:08,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:08,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 58 times [2020-10-11 12:45:08,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:08,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217268023] [2020-10-11 12:45:08,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:08,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217268023] [2020-10-11 12:45:08,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521886194] [2020-10-11 12:45:08,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:08,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:08,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:08,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:08,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:08,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:08,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:08,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179888269] [2020-10-11 12:45:08,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:08,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:08,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:08,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:08,568 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-10-11 12:45:08,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:08,760 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-11 12:45:08,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:45:08,761 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:08,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:08,763 INFO L225 Difference]: With dead ends: 185 [2020-10-11 12:45:08,763 INFO L226 Difference]: Without dead ends: 183 [2020-10-11 12:45:08,763 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:45:08,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-11 12:45:08,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-10-11 12:45:08,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-11 12:45:08,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-10-11 12:45:08,766 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-10-11 12:45:08,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:08,766 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-10-11 12:45:08,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:08,766 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-10-11 12:45:08,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:08,767 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:08,767 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:08,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:08,977 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:08,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:08,977 INFO L82 PathProgramCache]: Analyzing trace with hash 9395951, now seen corresponding path program 59 times [2020-10-11 12:45:08,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:08,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652957931] [2020-10-11 12:45:08,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:08,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:09,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652957931] [2020-10-11 12:45:09,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042064372] [2020-10-11 12:45:09,085 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:09,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:45:09,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:09,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:09,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:09,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:09,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:09,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899497372] [2020-10-11 12:45:09,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:09,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:09,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:09,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:09,239 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-10-11 12:45:09,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:09,312 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-10-11 12:45:09,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:45:09,313 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:09,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:09,314 INFO L225 Difference]: With dead ends: 182 [2020-10-11 12:45:09,314 INFO L226 Difference]: Without dead ends: 180 [2020-10-11 12:45:09,315 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:45:09,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-11 12:45:09,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-11 12:45:09,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-11 12:45:09,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-10-11 12:45:09,321 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-10-11 12:45:09,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:09,321 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-10-11 12:45:09,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:09,322 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-10-11 12:45:09,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:09,323 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:09,323 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:09,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-10-11 12:45:09,524 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:09,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:09,525 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 60 times [2020-10-11 12:45:09,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:09,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745831576] [2020-10-11 12:45:09,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:09,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:09,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745831576] [2020-10-11 12:45:09,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283318570] [2020-10-11 12:45:09,650 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:09,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:45:09,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:09,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:09,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:09,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:09,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:09,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854204231] [2020-10-11 12:45:09,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:09,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:09,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:09,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:09,873 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-10-11 12:45:10,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:10,087 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-10-11 12:45:10,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:45:10,087 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:10,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:10,089 INFO L225 Difference]: With dead ends: 185 [2020-10-11 12:45:10,089 INFO L226 Difference]: Without dead ends: 183 [2020-10-11 12:45:10,090 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-11 12:45:10,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-11 12:45:10,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-10-11 12:45:10,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:45:10,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-11 12:45:10,097 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-11 12:45:10,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:10,098 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-11 12:45:10,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:10,098 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-11 12:45:10,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:10,099 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:10,099 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:10,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:10,307 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:10,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:10,308 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 61 times [2020-10-11 12:45:10,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:10,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392635065] [2020-10-11 12:45:10,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:10,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392635065] [2020-10-11 12:45:10,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897826108] [2020-10-11 12:45:10,420 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:10,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:10,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:10,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:10,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:10,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222992651] [2020-10-11 12:45:10,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:10,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:10,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:10,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:10,617 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-11 12:45:10,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:10,829 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-10-11 12:45:10,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:45:10,829 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:10,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:10,831 INFO L225 Difference]: With dead ends: 191 [2020-10-11 12:45:10,831 INFO L226 Difference]: Without dead ends: 189 [2020-10-11 12:45:10,831 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:45:10,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-11 12:45:10,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-10-11 12:45:10,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-11 12:45:10,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-10-11 12:45:10,835 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-10-11 12:45:10,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:10,835 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-10-11 12:45:10,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:10,835 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-10-11 12:45:10,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:10,836 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:10,836 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:11,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:11,044 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:11,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:11,045 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 62 times [2020-10-11 12:45:11,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:11,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389387107] [2020-10-11 12:45:11,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:11,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:11,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:11,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389387107] [2020-10-11 12:45:11,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812071402] [2020-10-11 12:45:11,146 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:11,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:11,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:11,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:11,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:11,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:11,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:11,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29269073] [2020-10-11 12:45:11,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:11,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:11,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:11,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:11,374 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-10-11 12:45:11,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:11,616 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-10-11 12:45:11,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:11,617 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:11,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:11,618 INFO L225 Difference]: With dead ends: 187 [2020-10-11 12:45:11,618 INFO L226 Difference]: Without dead ends: 185 [2020-10-11 12:45:11,619 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:45:11,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-11 12:45:11,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-10-11 12:45:11,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:45:11,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-11 12:45:11,622 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-11 12:45:11,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:11,622 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-11 12:45:11,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:11,622 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-11 12:45:11,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:11,623 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:11,623 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:11,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-11 12:45:11,831 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:11,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:11,831 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 63 times [2020-10-11 12:45:11,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:11,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974758444] [2020-10-11 12:45:11,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:11,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:11,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974758444] [2020-10-11 12:45:11,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830181300] [2020-10-11 12:45:11,913 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:11,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:45:11,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:11,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:11,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:12,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:12,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:12,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655376106] [2020-10-11 12:45:12,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:12,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:12,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:12,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:12,059 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-11 12:45:12,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:12,300 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-10-11 12:45:12,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:45:12,301 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:12,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:12,302 INFO L225 Difference]: With dead ends: 198 [2020-10-11 12:45:12,302 INFO L226 Difference]: Without dead ends: 196 [2020-10-11 12:45:12,303 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:45:12,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-11 12:45:12,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-10-11 12:45:12,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:45:12,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-10-11 12:45:12,306 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-10-11 12:45:12,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:12,306 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-10-11 12:45:12,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:12,306 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-10-11 12:45:12,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:12,307 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:12,307 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:12,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:12,508 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:12,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:12,508 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 64 times [2020-10-11 12:45:12,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:12,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938597741] [2020-10-11 12:45:12,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:12,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:12,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938597741] [2020-10-11 12:45:12,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185688154] [2020-10-11 12:45:12,591 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:12,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:12,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:12,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:12,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:12,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:12,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:12,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:12,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523566361] [2020-10-11 12:45:12,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:12,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:12,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:12,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:12,744 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-10-11 12:45:13,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:13,001 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-10-11 12:45:13,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:45:13,002 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:13,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:13,003 INFO L225 Difference]: With dead ends: 189 [2020-10-11 12:45:13,003 INFO L226 Difference]: Without dead ends: 187 [2020-10-11 12:45:13,004 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:45:13,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-11 12:45:13,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-10-11 12:45:13,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-11 12:45:13,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-10-11 12:45:13,006 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-10-11 12:45:13,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:13,007 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-10-11 12:45:13,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:13,007 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-10-11 12:45:13,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:13,007 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:13,007 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:13,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-11 12:45:13,208 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:13,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:13,209 INFO L82 PathProgramCache]: Analyzing trace with hash 646625441, now seen corresponding path program 65 times [2020-10-11 12:45:13,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:13,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859747721] [2020-10-11 12:45:13,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:13,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859747721] [2020-10-11 12:45:13,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478178101] [2020-10-11 12:45:13,306 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:13,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:45:13,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:13,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:13,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:13,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:13,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:13,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139939331] [2020-10-11 12:45:13,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:13,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:13,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:13,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:13,460 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-10-11 12:45:13,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:13,545 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-10-11 12:45:13,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:45:13,546 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:13,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:13,548 INFO L225 Difference]: With dead ends: 178 [2020-10-11 12:45:13,548 INFO L226 Difference]: Without dead ends: 176 [2020-10-11 12:45:13,548 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:45:13,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-11 12:45:13,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-10-11 12:45:13,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-11 12:45:13,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-10-11 12:45:13,551 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-10-11 12:45:13,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:13,551 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-10-11 12:45:13,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:13,552 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-10-11 12:45:13,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:13,552 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:13,552 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:13,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:13,753 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:13,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:13,753 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 66 times [2020-10-11 12:45:13,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:13,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042991071] [2020-10-11 12:45:13,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:13,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:13,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042991071] [2020-10-11 12:45:13,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003771250] [2020-10-11 12:45:13,849 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:13,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:45:13,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:13,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:13,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:14,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:14,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:14,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:14,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363208925] [2020-10-11 12:45:14,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:14,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:14,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:14,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:14,008 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-10-11 12:45:14,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:14,207 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-10-11 12:45:14,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:14,208 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:14,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:14,210 INFO L225 Difference]: With dead ends: 193 [2020-10-11 12:45:14,210 INFO L226 Difference]: Without dead ends: 191 [2020-10-11 12:45:14,210 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:45:14,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-11 12:45:14,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-10-11 12:45:14,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-11 12:45:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-10-11 12:45:14,212 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-10-11 12:45:14,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:14,213 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-10-11 12:45:14,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:14,213 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-10-11 12:45:14,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:14,213 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:14,213 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:14,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-10-11 12:45:14,414 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:14,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:14,414 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 67 times [2020-10-11 12:45:14,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:14,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319748837] [2020-10-11 12:45:14,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:14,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319748837] [2020-10-11 12:45:14,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090498964] [2020-10-11 12:45:14,492 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:14,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:14,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:14,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:14,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:14,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415960397] [2020-10-11 12:45:14,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:14,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:14,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:14,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:14,686 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-10-11 12:45:14,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:14,914 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-11 12:45:14,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:14,914 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:14,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:14,916 INFO L225 Difference]: With dead ends: 195 [2020-10-11 12:45:14,916 INFO L226 Difference]: Without dead ends: 193 [2020-10-11 12:45:14,916 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-10-11 12:45:14,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-11 12:45:14,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-10-11 12:45:14,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-11 12:45:14,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-10-11 12:45:14,919 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-10-11 12:45:14,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:14,920 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-10-11 12:45:14,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:14,920 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-10-11 12:45:14,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:14,921 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:14,921 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:15,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:15,122 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:15,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:15,122 INFO L82 PathProgramCache]: Analyzing trace with hash 667181231, now seen corresponding path program 68 times [2020-10-11 12:45:15,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:15,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255081802] [2020-10-11 12:45:15,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:15,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255081802] [2020-10-11 12:45:15,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347666860] [2020-10-11 12:45:15,220 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:15,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:15,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:15,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:15,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:15,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:15,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:15,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:15,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247552917] [2020-10-11 12:45:15,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:15,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:15,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:15,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:15,370 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-10-11 12:45:15,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:15,484 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-10-11 12:45:15,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:45:15,484 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:15,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:15,486 INFO L225 Difference]: With dead ends: 174 [2020-10-11 12:45:15,486 INFO L226 Difference]: Without dead ends: 172 [2020-10-11 12:45:15,486 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:45:15,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-11 12:45:15,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-10-11 12:45:15,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:45:15,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-10-11 12:45:15,489 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-10-11 12:45:15,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:15,490 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-10-11 12:45:15,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:15,490 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-10-11 12:45:15,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:15,490 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:15,490 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:15,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-11 12:45:15,691 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:15,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:15,692 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 69 times [2020-10-11 12:45:15,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:15,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736301806] [2020-10-11 12:45:15,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:15,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736301806] [2020-10-11 12:45:15,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774705907] [2020-10-11 12:45:15,770 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:15,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:45:15,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:15,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:15,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:15,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:15,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:15,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194038904] [2020-10-11 12:45:15,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:15,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:15,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:15,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:15,924 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-10-11 12:45:16,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:16,150 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-10-11 12:45:16,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:45:16,151 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:16,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:16,152 INFO L225 Difference]: With dead ends: 189 [2020-10-11 12:45:16,153 INFO L226 Difference]: Without dead ends: 187 [2020-10-11 12:45:16,153 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-11 12:45:16,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-11 12:45:16,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-10-11 12:45:16,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-11 12:45:16,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-10-11 12:45:16,156 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-10-11 12:45:16,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:16,156 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-10-11 12:45:16,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:16,156 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-10-11 12:45:16,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:16,157 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:16,157 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:16,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:16,358 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:16,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:16,359 INFO L82 PathProgramCache]: Analyzing trace with hash 667844321, now seen corresponding path program 70 times [2020-10-11 12:45:16,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:16,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570452287] [2020-10-11 12:45:16,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:16,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570452287] [2020-10-11 12:45:16,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439588628] [2020-10-11 12:45:16,434 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:16,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:16,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:16,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:16,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:16,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:16,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:16,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614938818] [2020-10-11 12:45:16,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:16,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:16,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:16,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:16,590 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-10-11 12:45:16,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:16,724 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-10-11 12:45:16,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:45:16,725 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:16,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:16,726 INFO L225 Difference]: With dead ends: 175 [2020-10-11 12:45:16,726 INFO L226 Difference]: Without dead ends: 173 [2020-10-11 12:45:16,727 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:45:16,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-11 12:45:16,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-10-11 12:45:16,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-11 12:45:16,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-11 12:45:16,730 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-11 12:45:16,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:16,730 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-11 12:45:16,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:16,730 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-11 12:45:16,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:16,731 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:16,731 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:16,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:16,932 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:16,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:16,933 INFO L82 PathProgramCache]: Analyzing trace with hash 667866641, now seen corresponding path program 71 times [2020-10-11 12:45:16,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:16,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854752092] [2020-10-11 12:45:16,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:17,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854752092] [2020-10-11 12:45:17,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047467966] [2020-10-11 12:45:17,003 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:17,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:45:17,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:17,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:17,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:17,139 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:45:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:17,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:17,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:17,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420946060] [2020-10-11 12:45:17,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:17,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:17,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:17,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:17,174 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-11 12:45:17,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:17,490 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-10-11 12:45:17,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:17,491 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:17,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:17,492 INFO L225 Difference]: With dead ends: 195 [2020-10-11 12:45:17,492 INFO L226 Difference]: Without dead ends: 190 [2020-10-11 12:45:17,493 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:45:17,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-11 12:45:17,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-10-11 12:45:17,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-11 12:45:17,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-11 12:45:17,501 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-11 12:45:17,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:17,501 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-11 12:45:17,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:17,501 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-11 12:45:17,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:17,502 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:17,502 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:17,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:17,703 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:17,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:17,703 INFO L82 PathProgramCache]: Analyzing trace with hash 667874112, now seen corresponding path program 72 times [2020-10-11 12:45:17,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:17,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231054110] [2020-10-11 12:45:17,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:17,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231054110] [2020-10-11 12:45:17,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901700772] [2020-10-11 12:45:17,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:17,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:45:17,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:17,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:17,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:17,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:17,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:17,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545339270] [2020-10-11 12:45:17,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:17,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:17,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:17,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:17,959 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-11 12:45:18,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:18,209 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-10-11 12:45:18,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:45:18,209 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:18,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:18,210 INFO L225 Difference]: With dead ends: 187 [2020-10-11 12:45:18,210 INFO L226 Difference]: Without dead ends: 185 [2020-10-11 12:45:18,211 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:45:18,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-11 12:45:18,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-10-11 12:45:18,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-11 12:45:18,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-11 12:45:18,214 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-11 12:45:18,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:18,214 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-11 12:45:18,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:18,214 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-11 12:45:18,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:18,215 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:18,215 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:18,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:18,416 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:18,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:18,416 INFO L82 PathProgramCache]: Analyzing trace with hash 667895471, now seen corresponding path program 73 times [2020-10-11 12:45:18,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:18,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901965133] [2020-10-11 12:45:18,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:18,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901965133] [2020-10-11 12:45:18,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764371741] [2020-10-11 12:45:18,484 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:18,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:18,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:18,633 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:45:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:18,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:18,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:18,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741556131] [2020-10-11 12:45:18,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:18,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:18,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:18,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:18,664 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-11 12:45:19,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:19,085 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-10-11 12:45:19,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:45:19,086 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:19,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:19,088 INFO L225 Difference]: With dead ends: 212 [2020-10-11 12:45:19,088 INFO L226 Difference]: Without dead ends: 207 [2020-10-11 12:45:19,088 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:45:19,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-11 12:45:19,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-11 12:45:19,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-11 12:45:19,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-11 12:45:19,093 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-11 12:45:19,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:19,093 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-11 12:45:19,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:19,093 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-11 12:45:19,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:19,093 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:19,093 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:19,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-11 12:45:19,294 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:19,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:19,295 INFO L82 PathProgramCache]: Analyzing trace with hash 667896432, now seen corresponding path program 74 times [2020-10-11 12:45:19,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:19,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555934328] [2020-10-11 12:45:19,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:19,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555934328] [2020-10-11 12:45:19,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109869421] [2020-10-11 12:45:19,364 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:19,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:19,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:19,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:19,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:19,500 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:45:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:19,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:19,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:19,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003553323] [2020-10-11 12:45:19,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:19,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:19,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:19,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:19,523 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-11 12:45:19,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:19,831 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-11 12:45:19,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:19,831 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:19,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:19,832 INFO L225 Difference]: With dead ends: 202 [2020-10-11 12:45:19,833 INFO L226 Difference]: Without dead ends: 197 [2020-10-11 12:45:19,833 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:45:19,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-11 12:45:19,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-10-11 12:45:19,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-11 12:45:19,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-10-11 12:45:19,835 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-10-11 12:45:19,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:19,835 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-10-11 12:45:19,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:19,836 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-10-11 12:45:19,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:19,836 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:19,836 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:20,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:20,041 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:20,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:20,041 INFO L82 PathProgramCache]: Analyzing trace with hash 668104752, now seen corresponding path program 75 times [2020-10-11 12:45:20,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:20,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331031277] [2020-10-11 12:45:20,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:20,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331031277] [2020-10-11 12:45:20,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896451897] [2020-10-11 12:45:20,111 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:20,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:45:20,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:20,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:20,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:20,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:20,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:20,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257577639] [2020-10-11 12:45:20,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:20,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:20,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:20,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:20,781 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-10-11 12:45:21,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:21,061 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-10-11 12:45:21,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:21,062 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:21,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:21,064 INFO L225 Difference]: With dead ends: 198 [2020-10-11 12:45:21,064 INFO L226 Difference]: Without dead ends: 196 [2020-10-11 12:45:21,064 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:45:21,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-11 12:45:21,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-10-11 12:45:21,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-11 12:45:21,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-11 12:45:21,068 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-11 12:45:21,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:21,068 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-11 12:45:21,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:21,069 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-11 12:45:21,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:21,069 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:21,069 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:21,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-11 12:45:21,272 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:21,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:21,272 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 76 times [2020-10-11 12:45:21,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:21,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600237191] [2020-10-11 12:45:21,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:21,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:21,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:21,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600237191] [2020-10-11 12:45:21,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25996306] [2020-10-11 12:45:21,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:21,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:21,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:21,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:21,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:21,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:21,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:21,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053898144] [2020-10-11 12:45:21,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:21,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:21,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:21,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:21,749 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-11 12:45:22,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:22,115 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-10-11 12:45:22,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:45:22,116 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:22,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:22,118 INFO L225 Difference]: With dead ends: 209 [2020-10-11 12:45:22,118 INFO L226 Difference]: Without dead ends: 207 [2020-10-11 12:45:22,118 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:45:22,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-11 12:45:22,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-11 12:45:22,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-11 12:45:22,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-11 12:45:22,122 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-11 12:45:22,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:22,122 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-11 12:45:22,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:22,122 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-11 12:45:22,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:22,123 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:22,123 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:22,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-11 12:45:22,323 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:22,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:22,324 INFO L82 PathProgramCache]: Analyzing trace with hash 668789201, now seen corresponding path program 77 times [2020-10-11 12:45:22,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:22,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113302778] [2020-10-11 12:45:22,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:22,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113302778] [2020-10-11 12:45:22,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698379706] [2020-10-11 12:45:22,399 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:22,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:45:22,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:22,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:22,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:22,556 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:45:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:22,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:22,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:22,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18459230] [2020-10-11 12:45:22,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:22,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:22,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:22,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:22,593 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-11 12:45:23,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:23,123 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-10-11 12:45:23,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:45:23,123 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:23,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:23,125 INFO L225 Difference]: With dead ends: 217 [2020-10-11 12:45:23,125 INFO L226 Difference]: Without dead ends: 212 [2020-10-11 12:45:23,125 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-11 12:45:23,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-11 12:45:23,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-10-11 12:45:23,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-11 12:45:23,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-10-11 12:45:23,130 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-10-11 12:45:23,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:23,130 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-10-11 12:45:23,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:23,130 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-10-11 12:45:23,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:23,131 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:23,131 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:23,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-11 12:45:23,338 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:23,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:23,338 INFO L82 PathProgramCache]: Analyzing trace with hash 668790162, now seen corresponding path program 78 times [2020-10-11 12:45:23,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:23,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055952439] [2020-10-11 12:45:23,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:23,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055952439] [2020-10-11 12:45:23,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105967992] [2020-10-11 12:45:23,409 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:23,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:45:23,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:23,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:23,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:25,619 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:45:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:25,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:25,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:25,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611505040] [2020-10-11 12:45:25,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:25,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:25,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:25,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-10-11 12:45:25,667 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-10-11 12:45:29,965 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-11 12:45:34,199 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-11 12:45:34,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:34,663 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-10-11 12:45:34,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:45:34,663 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:34,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:34,664 INFO L225 Difference]: With dead ends: 236 [2020-10-11 12:45:34,664 INFO L226 Difference]: Without dead ends: 228 [2020-10-11 12:45:34,665 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-10-11 12:45:34,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-11 12:45:34,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-10-11 12:45:34,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-11 12:45:34,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-10-11 12:45:34,667 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-10-11 12:45:34,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:34,667 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-10-11 12:45:34,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:34,668 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-10-11 12:45:34,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:34,668 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:34,668 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:34,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-11 12:45:34,872 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:34,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:34,872 INFO L82 PathProgramCache]: Analyzing trace with hash 668818992, now seen corresponding path program 79 times [2020-10-11 12:45:34,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:34,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531455607] [2020-10-11 12:45:34,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:34,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:34,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531455607] [2020-10-11 12:45:34,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472668452] [2020-10-11 12:45:34,947 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:34,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:34,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:35,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:45:35,121 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:45:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:35,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:35,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:35,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931653450] [2020-10-11 12:45:35,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:35,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:35,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:35,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:35,155 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-10-11 12:45:35,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:35,719 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-10-11 12:45:35,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:45:35,719 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:35,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:35,720 INFO L225 Difference]: With dead ends: 219 [2020-10-11 12:45:35,720 INFO L226 Difference]: Without dead ends: 214 [2020-10-11 12:45:35,721 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:45:35,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-11 12:45:35,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-10-11 12:45:35,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-11 12:45:35,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-10-11 12:45:35,724 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-10-11 12:45:35,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:35,725 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-10-11 12:45:35,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:35,725 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-10-11 12:45:35,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:35,725 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:35,726 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:35,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:35,928 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:35,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:35,928 INFO L82 PathProgramCache]: Analyzing trace with hash 675254592, now seen corresponding path program 80 times [2020-10-11 12:45:35,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:35,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661780500] [2020-10-11 12:45:35,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:36,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661780500] [2020-10-11 12:45:36,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965046310] [2020-10-11 12:45:36,001 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:36,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:36,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:36,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:36,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:36,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:36,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:36,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942616012] [2020-10-11 12:45:36,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:36,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:36,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:36,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:36,165 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-10-11 12:45:36,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:36,430 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-10-11 12:45:36,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:45:36,431 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:36,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:36,431 INFO L225 Difference]: With dead ends: 197 [2020-10-11 12:45:36,431 INFO L226 Difference]: Without dead ends: 195 [2020-10-11 12:45:36,432 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:45:36,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-11 12:45:36,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-10-11 12:45:36,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-11 12:45:36,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-10-11 12:45:36,436 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-10-11 12:45:36,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:36,437 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-10-11 12:45:36,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:36,437 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-10-11 12:45:36,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:36,437 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:36,438 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:36,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:36,642 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:36,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:36,642 INFO L82 PathProgramCache]: Analyzing trace with hash 675255553, now seen corresponding path program 81 times [2020-10-11 12:45:36,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:36,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619166488] [2020-10-11 12:45:36,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:36,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:36,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:36,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619166488] [2020-10-11 12:45:36,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638037187] [2020-10-11 12:45:36,718 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:36,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:45:36,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:36,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:36,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:36,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:36,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:36,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:36,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979112319] [2020-10-11 12:45:36,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:36,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:36,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:36,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:36,911 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-10-11 12:45:37,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:37,218 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-10-11 12:45:37,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:45:37,218 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:37,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:37,219 INFO L225 Difference]: With dead ends: 202 [2020-10-11 12:45:37,219 INFO L226 Difference]: Without dead ends: 200 [2020-10-11 12:45:37,219 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:45:37,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-11 12:45:37,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-10-11 12:45:37,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-11 12:45:37,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-10-11 12:45:37,222 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-10-11 12:45:37,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:37,223 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-10-11 12:45:37,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:37,223 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-10-11 12:45:37,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:37,224 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:37,224 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:37,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-11 12:45:37,432 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:37,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:37,432 INFO L82 PathProgramCache]: Analyzing trace with hash 675284383, now seen corresponding path program 82 times [2020-10-11 12:45:37,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:37,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555916273] [2020-10-11 12:45:37,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:37,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555916273] [2020-10-11 12:45:37,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401414689] [2020-10-11 12:45:37,510 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:37,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:37,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:37,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:37,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:37,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:37,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:37,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809280315] [2020-10-11 12:45:37,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:37,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:37,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:37,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:37,698 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-10-11 12:45:37,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:37,980 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-10-11 12:45:37,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:45:37,980 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:37,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:37,981 INFO L225 Difference]: With dead ends: 197 [2020-10-11 12:45:37,981 INFO L226 Difference]: Without dead ends: 195 [2020-10-11 12:45:37,981 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:45:37,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-11 12:45:37,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-10-11 12:45:37,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:45:37,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-10-11 12:45:37,984 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-10-11 12:45:37,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:37,984 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-10-11 12:45:37,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:37,984 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-10-11 12:45:37,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:37,985 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:37,985 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:38,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-11 12:45:38,192 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:38,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:38,192 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 83 times [2020-10-11 12:45:38,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:38,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232898045] [2020-10-11 12:45:38,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:38,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232898045] [2020-10-11 12:45:38,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548529483] [2020-10-11 12:45:38,274 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:38,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:38,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:38,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:38,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:38,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:38,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:38,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288105634] [2020-10-11 12:45:38,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:38,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:38,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:38,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:38,518 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-10-11 12:45:39,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:39,106 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-10-11 12:45:39,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 12:45:39,107 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:39,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:39,108 INFO L225 Difference]: With dead ends: 214 [2020-10-11 12:45:39,108 INFO L226 Difference]: Without dead ends: 212 [2020-10-11 12:45:39,109 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:45:39,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-11 12:45:39,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-10-11 12:45:39,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-11 12:45:39,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-10-11 12:45:39,112 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-10-11 12:45:39,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:39,112 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-10-11 12:45:39,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:39,113 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-10-11 12:45:39,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:39,113 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:39,114 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:39,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-11 12:45:39,314 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:39,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:39,315 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 84 times [2020-10-11 12:45:39,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:39,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864686678] [2020-10-11 12:45:39,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:39,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:39,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864686678] [2020-10-11 12:45:39,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130377278] [2020-10-11 12:45:39,426 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:39,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:45:39,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:39,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:39,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:39,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:39,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:39,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846385679] [2020-10-11 12:45:39,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:39,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:39,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:39,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:39,656 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-10-11 12:45:40,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:40,035 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-10-11 12:45:40,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:45:40,035 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:40,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:40,036 INFO L225 Difference]: With dead ends: 217 [2020-10-11 12:45:40,036 INFO L226 Difference]: Without dead ends: 215 [2020-10-11 12:45:40,036 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:45:40,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-11 12:45:40,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-10-11 12:45:40,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-11 12:45:40,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-11 12:45:40,040 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-11 12:45:40,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:40,040 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-11 12:45:40,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:40,040 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-11 12:45:40,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:40,041 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:40,041 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:40,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:40,241 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:40,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:40,242 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 85 times [2020-10-11 12:45:40,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:40,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892823221] [2020-10-11 12:45:40,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:40,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892823221] [2020-10-11 12:45:40,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685178528] [2020-10-11 12:45:40,318 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:40,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:40,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:40,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:40,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:40,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339758606] [2020-10-11 12:45:40,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:40,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:40,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:40,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:40,486 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-11 12:45:40,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:40,911 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-10-11 12:45:40,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:45:40,911 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:40,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:40,912 INFO L225 Difference]: With dead ends: 211 [2020-10-11 12:45:40,912 INFO L226 Difference]: Without dead ends: 209 [2020-10-11 12:45:40,912 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:45:40,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-11 12:45:40,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-10-11 12:45:40,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-11 12:45:40,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-11 12:45:40,916 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-11 12:45:40,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:40,916 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-11 12:45:40,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:40,916 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-11 12:45:40,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:40,917 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:40,917 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:41,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:41,118 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:41,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:41,118 INFO L82 PathProgramCache]: Analyzing trace with hash 696494831, now seen corresponding path program 86 times [2020-10-11 12:45:41,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:41,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630680403] [2020-10-11 12:45:41,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:41,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630680403] [2020-10-11 12:45:41,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348331909] [2020-10-11 12:45:41,197 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:41,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:41,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:41,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:41,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:41,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:45:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:41,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:41,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:41,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581114898] [2020-10-11 12:45:41,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:41,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:41,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:41,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:41,353 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-11 12:45:41,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:41,834 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-10-11 12:45:41,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:45:41,835 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:41,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:41,836 INFO L225 Difference]: With dead ends: 211 [2020-10-11 12:45:41,836 INFO L226 Difference]: Without dead ends: 206 [2020-10-11 12:45:41,837 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:45:41,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-11 12:45:41,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-10-11 12:45:41,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-11 12:45:41,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-11 12:45:41,840 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-11 12:45:41,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:41,840 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-11 12:45:41,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:41,841 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-11 12:45:41,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:41,841 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:41,841 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:42,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-11 12:45:42,042 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:42,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:42,042 INFO L82 PathProgramCache]: Analyzing trace with hash 696495792, now seen corresponding path program 87 times [2020-10-11 12:45:42,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:42,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529089468] [2020-10-11 12:45:42,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:42,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529089468] [2020-10-11 12:45:42,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797013848] [2020-10-11 12:45:42,121 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:42,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:45:42,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:42,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:42,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:42,270 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:45:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:42,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:42,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:42,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921057080] [2020-10-11 12:45:42,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:42,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:42,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:42,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:42,308 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-11 12:45:42,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:42,915 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-10-11 12:45:42,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 12:45:42,915 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:42,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:42,916 INFO L225 Difference]: With dead ends: 227 [2020-10-11 12:45:42,917 INFO L226 Difference]: Without dead ends: 222 [2020-10-11 12:45:42,917 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 12:45:42,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-11 12:45:42,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-10-11 12:45:42,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-11 12:45:42,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-11 12:45:42,919 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-11 12:45:42,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:42,920 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-11 12:45:42,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:42,920 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-11 12:45:42,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:42,920 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:42,920 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:43,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-11 12:45:43,124 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:43,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:43,124 INFO L82 PathProgramCache]: Analyzing trace with hash 696503263, now seen corresponding path program 88 times [2020-10-11 12:45:43,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:43,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873746569] [2020-10-11 12:45:43,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:43,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873746569] [2020-10-11 12:45:43,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588668317] [2020-10-11 12:45:43,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:43,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:43,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:43,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:43,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:43,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:43,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:43,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938333132] [2020-10-11 12:45:43,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:43,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:43,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:43,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:43,357 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-11 12:45:43,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:43,840 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-10-11 12:45:43,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:45:43,840 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:43,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:43,841 INFO L225 Difference]: With dead ends: 221 [2020-10-11 12:45:43,841 INFO L226 Difference]: Without dead ends: 219 [2020-10-11 12:45:43,841 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:45:43,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-11 12:45:43,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-10-11 12:45:43,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-11 12:45:43,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-11 12:45:43,844 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-11 12:45:43,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:43,844 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-11 12:45:43,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:43,844 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-11 12:45:43,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:43,844 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:43,844 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:44,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:44,047 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:44,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:44,052 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 89 times [2020-10-11 12:45:44,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:44,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492765371] [2020-10-11 12:45:44,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:44,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492765371] [2020-10-11 12:45:44,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827751387] [2020-10-11 12:45:44,127 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:44,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:45:44,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:44,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:44,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:44,264 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:45:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:44,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:44,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:44,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729566988] [2020-10-11 12:45:44,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:44,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:44,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:44,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:44,276 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-11 12:45:44,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:44,873 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-10-11 12:45:44,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:45:44,873 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:44,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:44,874 INFO L225 Difference]: With dead ends: 240 [2020-10-11 12:45:44,874 INFO L226 Difference]: Without dead ends: 232 [2020-10-11 12:45:44,874 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:45:44,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-11 12:45:44,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-10-11 12:45:44,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-11 12:45:44,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-10-11 12:45:44,878 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-10-11 12:45:44,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:44,878 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-10-11 12:45:44,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:44,878 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-10-11 12:45:44,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:44,879 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:44,879 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:45,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-11 12:45:45,080 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:45,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:45,080 INFO L82 PathProgramCache]: Analyzing trace with hash 696525583, now seen corresponding path program 90 times [2020-10-11 12:45:45,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:45,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183697345] [2020-10-11 12:45:45,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:45,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183697345] [2020-10-11 12:45:45,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812263740] [2020-10-11 12:45:45,157 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:45,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:45:45,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:45,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:45,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:45,324 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:45:45,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:45,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:45,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:45,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896177661] [2020-10-11 12:45:45,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:45,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:45,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:45,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:45,345 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-10-11 12:45:45,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:45,965 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-10-11 12:45:45,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:45:45,966 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:45,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:45,967 INFO L225 Difference]: With dead ends: 238 [2020-10-11 12:45:45,967 INFO L226 Difference]: Without dead ends: 230 [2020-10-11 12:45:45,968 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:45:45,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-11 12:45:45,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-10-11 12:45:45,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:45:45,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-11 12:45:45,970 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-11 12:45:45,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:45,970 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-11 12:45:45,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:45,971 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-11 12:45:45,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:45,971 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:45,971 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:46,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:46,181 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:46,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:46,181 INFO L82 PathProgramCache]: Analyzing trace with hash 696733903, now seen corresponding path program 91 times [2020-10-11 12:45:46,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:46,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086233773] [2020-10-11 12:45:46,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:46,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086233773] [2020-10-11 12:45:46,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025966354] [2020-10-11 12:45:46,256 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:46,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:46,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:46,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:46,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:46,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527019165] [2020-10-11 12:45:46,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:46,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:46,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:46,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:46,438 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-11 12:45:46,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:46,712 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-10-11 12:45:46,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:46,713 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:46,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:46,714 INFO L225 Difference]: With dead ends: 195 [2020-10-11 12:45:46,714 INFO L226 Difference]: Without dead ends: 193 [2020-10-11 12:45:46,715 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:45:46,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-11 12:45:46,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-10-11 12:45:46,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:45:46,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-11 12:45:46,718 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-11 12:45:46,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:46,718 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-11 12:45:46,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:46,718 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-11 12:45:46,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:46,719 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:46,719 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:46,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-10-11 12:45:46,919 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:46,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:46,920 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 92 times [2020-10-11 12:45:46,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:46,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324896915] [2020-10-11 12:45:46,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:46,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324896915] [2020-10-11 12:45:46,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500349178] [2020-10-11 12:45:46,998 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:47,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:47,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:47,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:47,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:47,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:47,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:47,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:47,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419392873] [2020-10-11 12:45:47,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:47,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:47,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:47,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:47,178 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-11 12:45:47,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:47,676 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-10-11 12:45:47,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:45:47,677 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:47,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:47,678 INFO L225 Difference]: With dead ends: 206 [2020-10-11 12:45:47,678 INFO L226 Difference]: Without dead ends: 204 [2020-10-11 12:45:47,678 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:45:47,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-11 12:45:47,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-10-11 12:45:47,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-11 12:45:47,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-10-11 12:45:47,681 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-10-11 12:45:47,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:47,681 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-10-11 12:45:47,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:47,681 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-10-11 12:45:47,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:47,682 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:47,682 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:47,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:47,882 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:47,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:47,883 INFO L82 PathProgramCache]: Analyzing trace with hash 697419313, now seen corresponding path program 93 times [2020-10-11 12:45:47,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:47,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769914558] [2020-10-11 12:45:47,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:47,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769914558] [2020-10-11 12:45:47,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681729813] [2020-10-11 12:45:47,964 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:48,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:45:48,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:48,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:48,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:48,140 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:45:52,277 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 19 [2020-10-11 12:45:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:52,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:52,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-11 12:45:52,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532574694] [2020-10-11 12:45:52,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 12:45:52,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:52,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 12:45:52,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-10-11 12:45:52,280 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-10-11 12:45:53,822 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-11 12:46:13,924 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-11 12:46:43,364 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-10-11 12:47:02,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:02,207 INFO L93 Difference]: Finished difference Result 242 states and 573 transitions. [2020-10-11 12:47:02,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 12:47:02,238 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-11 12:47:02,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:02,239 INFO L225 Difference]: With dead ends: 242 [2020-10-11 12:47:02,239 INFO L226 Difference]: Without dead ends: 237 [2020-10-11 12:47:02,240 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 34.9s TimeCoverageRelationStatistics Valid=389, Invalid=934, Unknown=9, NotChecked=0, Total=1332 [2020-10-11 12:47:02,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-11 12:47:02,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 139. [2020-10-11 12:47:02,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-11 12:47:02,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-10-11 12:47:02,243 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-10-11 12:47:02,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:02,244 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-10-11 12:47:02,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 12:47:02,244 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-10-11 12:47:02,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:02,244 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:02,244 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:02,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-10-11 12:47:02,445 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:02,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:02,446 INFO L82 PathProgramCache]: Analyzing trace with hash 896899632, now seen corresponding path program 94 times [2020-10-11 12:47:02,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:02,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329999512] [2020-10-11 12:47:02,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:02,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:02,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329999512] [2020-10-11 12:47:02,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821879268] [2020-10-11 12:47:02,536 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:02,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:47:02,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:02,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:02,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:02,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:02,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:02,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578327971] [2020-10-11 12:47:02,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:02,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:02,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:02,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:02,709 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-10-11 12:47:02,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:02,933 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-11 12:47:02,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:47:02,933 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:02,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:02,934 INFO L225 Difference]: With dead ends: 194 [2020-10-11 12:47:02,934 INFO L226 Difference]: Without dead ends: 192 [2020-10-11 12:47:02,934 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:47:02,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-11 12:47:02,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-10-11 12:47:02,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-11 12:47:02,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-10-11 12:47:02,937 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-10-11 12:47:02,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:02,937 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-10-11 12:47:02,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:02,937 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-10-11 12:47:02,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:02,937 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:02,937 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:03,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:03,138 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:03,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:03,139 INFO L82 PathProgramCache]: Analyzing trace with hash 896900593, now seen corresponding path program 95 times [2020-10-11 12:47:03,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:03,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863683408] [2020-10-11 12:47:03,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:03,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:03,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863683408] [2020-10-11 12:47:03,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704369192] [2020-10-11 12:47:03,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:03,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:47:03,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:03,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:03,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:03,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:03,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:03,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:03,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576691832] [2020-10-11 12:47:03,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:03,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:03,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:03,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:03,414 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-10-11 12:47:03,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:03,741 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-10-11 12:47:03,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:47:03,741 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:03,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:03,742 INFO L225 Difference]: With dead ends: 205 [2020-10-11 12:47:03,742 INFO L226 Difference]: Without dead ends: 203 [2020-10-11 12:47:03,742 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:47:03,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-11 12:47:03,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-10-11 12:47:03,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:47:03,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-10-11 12:47:03,746 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-10-11 12:47:03,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:03,746 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-10-11 12:47:03,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:03,747 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-10-11 12:47:03,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:03,747 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:03,747 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:03,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:03,948 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:03,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:03,948 INFO L82 PathProgramCache]: Analyzing trace with hash 896929423, now seen corresponding path program 96 times [2020-10-11 12:47:03,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:03,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663684002] [2020-10-11 12:47:03,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:04,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:04,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663684002] [2020-10-11 12:47:04,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644346912] [2020-10-11 12:47:04,033 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:04,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:47:04,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:04,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:04,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:04,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:04,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:04,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167484292] [2020-10-11 12:47:04,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:04,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:04,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:04,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:04,205 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-10-11 12:47:04,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:04,486 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-11 12:47:04,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:47:04,486 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:04,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:04,487 INFO L225 Difference]: With dead ends: 201 [2020-10-11 12:47:04,487 INFO L226 Difference]: Without dead ends: 199 [2020-10-11 12:47:04,487 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:47:04,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-11 12:47:04,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-10-11 12:47:04,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-11 12:47:04,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-10-11 12:47:04,489 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-10-11 12:47:04,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:04,490 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-10-11 12:47:04,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:04,490 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-10-11 12:47:04,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:04,490 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:04,490 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:04,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:04,691 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:04,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:04,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 97 times [2020-10-11 12:47:04,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:04,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972552735] [2020-10-11 12:47:04,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:04,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972552735] [2020-10-11 12:47:04,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668277025] [2020-10-11 12:47:04,773 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:04,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:04,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:04,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:04,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:04,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865368888] [2020-10-11 12:47:04,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:04,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:04,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:04,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:04,954 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-10-11 12:47:05,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:05,201 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-11 12:47:05,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:47:05,202 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:05,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:05,202 INFO L225 Difference]: With dead ends: 194 [2020-10-11 12:47:05,202 INFO L226 Difference]: Without dead ends: 192 [2020-10-11 12:47:05,203 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-10-11 12:47:05,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-11 12:47:05,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-10-11 12:47:05,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-11 12:47:05,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-10-11 12:47:05,206 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-10-11 12:47:05,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:05,206 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-10-11 12:47:05,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:05,206 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-10-11 12:47:05,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:05,207 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:05,207 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:05,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-11 12:47:05,415 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:05,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:05,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 98 times [2020-10-11 12:47:05,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:05,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543592016] [2020-10-11 12:47:05,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:05,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543592016] [2020-10-11 12:47:05,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104619110] [2020-10-11 12:47:05,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:05,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:47:05,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:05,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:05,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:05,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:05,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:05,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:05,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070165914] [2020-10-11 12:47:05,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:05,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:05,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:05,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:05,688 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-10-11 12:47:06,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:06,046 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-10-11 12:47:06,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:47:06,047 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:06,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:06,047 INFO L225 Difference]: With dead ends: 209 [2020-10-11 12:47:06,048 INFO L226 Difference]: Without dead ends: 207 [2020-10-11 12:47:06,048 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:47:06,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-11 12:47:06,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-10-11 12:47:06,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-11 12:47:06,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-10-11 12:47:06,052 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-10-11 12:47:06,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:06,052 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-10-11 12:47:06,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:06,052 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-10-11 12:47:06,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:06,053 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:06,053 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:06,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:06,263 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:06,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:06,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 99 times [2020-10-11 12:47:06,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:06,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093856346] [2020-10-11 12:47:06,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:06,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093856346] [2020-10-11 12:47:06,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557327308] [2020-10-11 12:47:06,342 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:06,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:47:06,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:06,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:06,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:06,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:06,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:06,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850899521] [2020-10-11 12:47:06,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:06,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:06,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:06,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:06,525 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-10-11 12:47:06,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:06,849 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-10-11 12:47:06,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:47:06,849 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:06,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:06,850 INFO L225 Difference]: With dead ends: 202 [2020-10-11 12:47:06,850 INFO L226 Difference]: Without dead ends: 200 [2020-10-11 12:47:06,850 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:47:06,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-11 12:47:06,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-10-11 12:47:06,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-11 12:47:06,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-11 12:47:06,853 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-11 12:47:06,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:06,854 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-11 12:47:06,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:06,854 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-11 12:47:06,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:06,854 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:06,854 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:07,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-11 12:47:07,055 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:07,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:07,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 100 times [2020-10-11 12:47:07,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:07,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786749240] [2020-10-11 12:47:07,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:07,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:07,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786749240] [2020-10-11 12:47:07,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132718568] [2020-10-11 12:47:07,139 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:07,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:47:07,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:07,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:07,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:07,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:07,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:07,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621017724] [2020-10-11 12:47:07,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:07,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:07,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:07,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:07,313 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-10-11 12:47:07,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:07,635 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-11 12:47:07,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:47:07,636 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:07,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:07,636 INFO L225 Difference]: With dead ends: 201 [2020-10-11 12:47:07,637 INFO L226 Difference]: Without dead ends: 199 [2020-10-11 12:47:07,637 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:47:07,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-11 12:47:07,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-10-11 12:47:07,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-11 12:47:07,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-10-11 12:47:07,640 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-10-11 12:47:07,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:07,640 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-10-11 12:47:07,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:07,640 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-10-11 12:47:07,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:07,641 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:07,641 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:07,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-11 12:47:07,842 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:07,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:07,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 101 times [2020-10-11 12:47:07,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:07,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783802881] [2020-10-11 12:47:07,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:07,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:07,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783802881] [2020-10-11 12:47:07,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620753583] [2020-10-11 12:47:07,924 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:07,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:47:07,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:07,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:07,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:08,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:08,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:08,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996309383] [2020-10-11 12:47:08,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:08,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:08,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:08,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:08,104 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-10-11 12:47:08,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:08,576 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-10-11 12:47:08,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 12:47:08,577 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:08,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:08,577 INFO L225 Difference]: With dead ends: 215 [2020-10-11 12:47:08,577 INFO L226 Difference]: Without dead ends: 213 [2020-10-11 12:47:08,578 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:47:08,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-11 12:47:08,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-10-11 12:47:08,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:47:08,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-11 12:47:08,581 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-11 12:47:08,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:08,582 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-11 12:47:08,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:08,582 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-11 12:47:08,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:08,582 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:08,582 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:08,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:08,787 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:08,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:08,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 102 times [2020-10-11 12:47:08,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:08,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868433388] [2020-10-11 12:47:08,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:08,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:08,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:08,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868433388] [2020-10-11 12:47:08,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668246940] [2020-10-11 12:47:08,873 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:08,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:47:08,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:08,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:08,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:09,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:09,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:09,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480178143] [2020-10-11 12:47:09,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:09,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:09,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:09,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:09,053 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-11 12:47:09,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:09,438 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-10-11 12:47:09,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:47:09,438 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:09,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:09,439 INFO L225 Difference]: With dead ends: 196 [2020-10-11 12:47:09,439 INFO L226 Difference]: Without dead ends: 194 [2020-10-11 12:47:09,439 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:47:09,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-11 12:47:09,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-10-11 12:47:09,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-11 12:47:09,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-11 12:47:09,443 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-11 12:47:09,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:09,443 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-11 12:47:09,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:09,443 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-11 12:47:09,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:09,444 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:09,444 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:09,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:09,646 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:09,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:09,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1555369361, now seen corresponding path program 103 times [2020-10-11 12:47:09,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:09,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081111539] [2020-10-11 12:47:09,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:09,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081111539] [2020-10-11 12:47:09,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780315204] [2020-10-11 12:47:09,727 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:09,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:09,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:09,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:47:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:09,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:09,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:09,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756413678] [2020-10-11 12:47:09,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:09,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:09,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:09,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:09,885 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-11 12:47:10,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:10,188 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-10-11 12:47:10,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:47:10,188 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:10,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:10,189 INFO L225 Difference]: With dead ends: 191 [2020-10-11 12:47:10,189 INFO L226 Difference]: Without dead ends: 186 [2020-10-11 12:47:10,189 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:47:10,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-11 12:47:10,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-10-11 12:47:10,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-11 12:47:10,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-11 12:47:10,192 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-11 12:47:10,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:10,193 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-11 12:47:10,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:10,193 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-11 12:47:10,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:10,193 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:10,193 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:10,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-11 12:47:10,394 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:10,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:10,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1555370322, now seen corresponding path program 104 times [2020-10-11 12:47:10,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:10,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342237922] [2020-10-11 12:47:10,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:10,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342237922] [2020-10-11 12:47:10,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731170772] [2020-10-11 12:47:10,486 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:10,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:47:10,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:10,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:10,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:10,637 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:47:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:10,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:10,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:10,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871800862] [2020-10-11 12:47:10,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:10,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:10,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:10,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:10,682 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-11 12:47:11,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:11,265 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-10-11 12:47:11,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:47:11,271 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:11,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:11,272 INFO L225 Difference]: With dead ends: 232 [2020-10-11 12:47:11,272 INFO L226 Difference]: Without dead ends: 227 [2020-10-11 12:47:11,273 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:47:11,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-11 12:47:11,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-10-11 12:47:11,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:47:11,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-11 12:47:11,276 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-11 12:47:11,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:11,276 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-11 12:47:11,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:11,276 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-11 12:47:11,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:11,277 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:11,277 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:11,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:11,486 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:11,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:11,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1555377793, now seen corresponding path program 105 times [2020-10-11 12:47:11,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:11,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360116746] [2020-10-11 12:47:11,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:11,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:11,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360116746] [2020-10-11 12:47:11,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108534839] [2020-10-11 12:47:11,571 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:11,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:47:11,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:11,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:11,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:11,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:11,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:11,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132823443] [2020-10-11 12:47:11,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:11,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:11,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:11,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:11,764 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-11 12:47:12,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:12,309 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-10-11 12:47:12,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:47:12,309 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:12,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:12,310 INFO L225 Difference]: With dead ends: 222 [2020-10-11 12:47:12,311 INFO L226 Difference]: Without dead ends: 220 [2020-10-11 12:47:12,311 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:47:12,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-11 12:47:12,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-10-11 12:47:12,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-11 12:47:12,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-11 12:47:12,314 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-11 12:47:12,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:12,314 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-11 12:47:12,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:12,315 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-11 12:47:12,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:12,315 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:12,315 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:12,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:12,516 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:12,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:12,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 106 times [2020-10-11 12:47:12,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:12,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893817667] [2020-10-11 12:47:12,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:12,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893817667] [2020-10-11 12:47:12,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920095172] [2020-10-11 12:47:12,598 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:12,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:47:12,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:12,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:12,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:12,768 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:47:12,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:12,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:12,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:12,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241771949] [2020-10-11 12:47:12,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:12,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:12,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:12,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:12,805 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-11 12:47:13,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:13,595 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-10-11 12:47:13,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:47:13,596 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:13,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:13,597 INFO L225 Difference]: With dead ends: 254 [2020-10-11 12:47:13,597 INFO L226 Difference]: Without dead ends: 246 [2020-10-11 12:47:13,598 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:47:13,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-11 12:47:13,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-10-11 12:47:13,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-11 12:47:13,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-10-11 12:47:13,601 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-10-11 12:47:13,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:13,602 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-10-11 12:47:13,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:13,602 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-10-11 12:47:13,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:13,602 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:13,602 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:13,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:13,813 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:13,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:13,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1555400113, now seen corresponding path program 107 times [2020-10-11 12:47:13,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:13,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659215779] [2020-10-11 12:47:13,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:13,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659215779] [2020-10-11 12:47:13,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130052626] [2020-10-11 12:47:13,905 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:13,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:47:13,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:13,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:13,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:14,066 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:47:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:14,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:14,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:14,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025738428] [2020-10-11 12:47:14,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:14,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:14,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:14,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:14,090 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-10-11 12:47:14,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:14,915 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-10-11 12:47:14,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:47:14,916 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:14,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:14,917 INFO L225 Difference]: With dead ends: 246 [2020-10-11 12:47:14,917 INFO L226 Difference]: Without dead ends: 238 [2020-10-11 12:47:14,918 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 12:47:14,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-11 12:47:14,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-10-11 12:47:14,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-11 12:47:14,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-10-11 12:47:14,921 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-10-11 12:47:14,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:14,922 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-10-11 12:47:14,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:14,922 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-10-11 12:47:14,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:14,922 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:14,922 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:15,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-10-11 12:47:15,132 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:15,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:15,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1555608433, now seen corresponding path program 108 times [2020-10-11 12:47:15,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:15,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706779051] [2020-10-11 12:47:15,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:15,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:15,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706779051] [2020-10-11 12:47:15,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749586439] [2020-10-11 12:47:15,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:15,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:47:15,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:15,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:15,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:15,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:15,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:15,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909769648] [2020-10-11 12:47:15,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:15,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:15,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:15,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:15,385 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-10-11 12:47:15,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:15,794 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-10-11 12:47:15,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:47:15,795 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:15,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:15,795 INFO L225 Difference]: With dead ends: 208 [2020-10-11 12:47:15,796 INFO L226 Difference]: Without dead ends: 206 [2020-10-11 12:47:15,796 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:47:15,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-11 12:47:15,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-10-11 12:47:15,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-11 12:47:15,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-10-11 12:47:15,799 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-10-11 12:47:15,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:15,799 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-10-11 12:47:15,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:15,799 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-10-11 12:47:15,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:15,799 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:15,799 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:16,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-11 12:47:16,000 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:16,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:16,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 109 times [2020-10-11 12:47:16,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:16,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012440627] [2020-10-11 12:47:16,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:16,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012440627] [2020-10-11 12:47:16,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28797221] [2020-10-11 12:47:16,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:16,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:16,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:16,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:16,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:16,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168727235] [2020-10-11 12:47:16,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:16,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:16,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:16,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:16,251 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-10-11 12:47:16,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:16,797 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-10-11 12:47:16,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:47:16,797 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:16,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:16,798 INFO L225 Difference]: With dead ends: 215 [2020-10-11 12:47:16,798 INFO L226 Difference]: Without dead ends: 213 [2020-10-11 12:47:16,798 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-10-11 12:47:16,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-11 12:47:16,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-10-11 12:47:16,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-11 12:47:16,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-11 12:47:16,801 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-11 12:47:16,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:16,801 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-11 12:47:16,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:16,801 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-11 12:47:16,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:16,802 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:16,802 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:17,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-10-11 12:47:17,003 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:17,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:17,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 110 times [2020-10-11 12:47:17,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:17,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218475896] [2020-10-11 12:47:17,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:17,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218475896] [2020-10-11 12:47:17,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510098865] [2020-10-11 12:47:17,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:17,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:47:17,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:17,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:17,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:17,247 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:47:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:17,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:17,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:17,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825464665] [2020-10-11 12:47:17,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:17,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:17,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:17,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:17,260 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-11 12:47:17,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:17,858 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-10-11 12:47:17,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:47:17,859 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:17,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:17,860 INFO L225 Difference]: With dead ends: 236 [2020-10-11 12:47:17,860 INFO L226 Difference]: Without dead ends: 228 [2020-10-11 12:47:17,861 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:47:17,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-11 12:47:17,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-10-11 12:47:17,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-11 12:47:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-11 12:47:17,863 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-11 12:47:17,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:17,863 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-11 12:47:17,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:17,863 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-11 12:47:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:17,864 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:17,864 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:18,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-11 12:47:18,064 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:18,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:18,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1556293843, now seen corresponding path program 111 times [2020-10-11 12:47:18,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:18,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766191740] [2020-10-11 12:47:18,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:18,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:18,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:18,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766191740] [2020-10-11 12:47:18,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496396763] [2020-10-11 12:47:18,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:18,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:47:18,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:18,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:18,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:18,294 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:47:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:18,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:18,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:18,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117327027] [2020-10-11 12:47:18,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:18,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:18,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:18,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:18,306 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-11 12:47:18,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:18,974 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-10-11 12:47:18,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:47:18,975 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:18,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:18,976 INFO L225 Difference]: With dead ends: 241 [2020-10-11 12:47:18,976 INFO L226 Difference]: Without dead ends: 233 [2020-10-11 12:47:18,976 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:47:18,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-11 12:47:18,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-10-11 12:47:18,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-11 12:47:18,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-10-11 12:47:18,979 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-10-11 12:47:18,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:18,979 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-10-11 12:47:18,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:18,980 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-10-11 12:47:18,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:18,980 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:18,980 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:19,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-11 12:47:19,181 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:19,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:19,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1556322673, now seen corresponding path program 112 times [2020-10-11 12:47:19,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:19,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947137280] [2020-10-11 12:47:19,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:19,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947137280] [2020-10-11 12:47:19,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912142346] [2020-10-11 12:47:19,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:19,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:47:19,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:19,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:19,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:19,426 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:47:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:19,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:19,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:19,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531686251] [2020-10-11 12:47:19,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:19,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:19,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:19,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:19,440 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-10-11 12:47:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:20,090 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-10-11 12:47:20,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 12:47:20,090 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:20,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:20,091 INFO L225 Difference]: With dead ends: 232 [2020-10-11 12:47:20,092 INFO L226 Difference]: Without dead ends: 224 [2020-10-11 12:47:20,092 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 12:47:20,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-11 12:47:20,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-10-11 12:47:20,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-11 12:47:20,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-11 12:47:20,096 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-11 12:47:20,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:20,096 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-11 12:47:20,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:20,096 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-11 12:47:20,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:20,096 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:20,096 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:20,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:20,297 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:20,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:20,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1725446472, now seen corresponding path program 6 times [2020-10-11 12:47:20,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:20,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368115293] [2020-10-11 12:47:20,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:20,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368115293] [2020-10-11 12:47:20,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504702734] [2020-10-11 12:47:20,419 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:20,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 12:47:20,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:20,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:20,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:20,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:47:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:20,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:20,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-11 12:47:20,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889997994] [2020-10-11 12:47:20,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 12:47:20,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:20,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 12:47:20,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:47:20,656 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-10-11 12:47:20,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:20,861 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-10-11 12:47:20,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:47:20,862 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-10-11 12:47:20,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:20,863 INFO L225 Difference]: With dead ends: 185 [2020-10-11 12:47:20,863 INFO L226 Difference]: Without dead ends: 180 [2020-10-11 12:47:20,864 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:47:20,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-11 12:47:20,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-10-11 12:47:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-11 12:47:20,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-11 12:47:20,867 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-11 12:47:20,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:20,868 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-11 12:47:20,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 12:47:20,868 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-11 12:47:20,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:20,868 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:20,868 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:21,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-10-11 12:47:21,069 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:21,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:21,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 21 times [2020-10-11 12:47:21,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:21,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663708606] [2020-10-11 12:47:21,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:21,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663708606] [2020-10-11 12:47:21,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146870670] [2020-10-11 12:47:21,244 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:21,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 12:47:21,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:21,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:21,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:21,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:21,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:21,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925300032] [2020-10-11 12:47:21,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:21,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:21,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:21,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:21,477 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-10-11 12:47:21,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:21,542 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-10-11 12:47:21,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:47:21,543 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-11 12:47:21,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:21,543 INFO L225 Difference]: With dead ends: 180 [2020-10-11 12:47:21,543 INFO L226 Difference]: Without dead ends: 177 [2020-10-11 12:47:21,543 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:21,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-11 12:47:21,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-10-11 12:47:21,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-11 12:47:21,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-11 12:47:21,546 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-11 12:47:21,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:21,546 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-11 12:47:21,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:21,546 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-11 12:47:21,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:21,547 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:21,547 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:21,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-11 12:47:21,748 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:21,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:21,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1413108102, now seen corresponding path program 22 times [2020-10-11 12:47:21,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:21,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078785656] [2020-10-11 12:47:21,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:21,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078785656] [2020-10-11 12:47:21,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001181834] [2020-10-11 12:47:21,901 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:21,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:47:21,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:21,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:21,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:22,121 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:22,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:22,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:22,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251716692] [2020-10-11 12:47:22,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:22,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:22,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:22,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:22,123 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-11 12:47:22,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:22,197 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-10-11 12:47:22,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:47:22,198 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-11 12:47:22,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:22,198 INFO L225 Difference]: With dead ends: 197 [2020-10-11 12:47:22,199 INFO L226 Difference]: Without dead ends: 194 [2020-10-11 12:47:22,199 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:47:22,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-11 12:47:22,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-10-11 12:47:22,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-11 12:47:22,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-11 12:47:22,202 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-11 12:47:22,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:22,202 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-11 12:47:22,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:22,202 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-11 12:47:22,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:22,203 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:22,203 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:22,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:22,411 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:22,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:22,411 INFO L82 PathProgramCache]: Analyzing trace with hash 551260342, now seen corresponding path program 23 times [2020-10-11 12:47:22,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:22,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53161457] [2020-10-11 12:47:22,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:22,551 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:22,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53161457] [2020-10-11 12:47:22,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923322480] [2020-10-11 12:47:22,552 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:22,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 12:47:22,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:22,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:22,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:22,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:22,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:22,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634907796] [2020-10-11 12:47:22,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:22,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:22,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:22,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:22,758 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-11 12:47:22,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:22,865 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-10-11 12:47:22,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:47:22,866 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-11 12:47:22,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:22,867 INFO L225 Difference]: With dead ends: 196 [2020-10-11 12:47:22,867 INFO L226 Difference]: Without dead ends: 193 [2020-10-11 12:47:22,867 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:47:22,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-11 12:47:22,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-10-11 12:47:22,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-11 12:47:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-10-11 12:47:22,870 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-10-11 12:47:22,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:22,870 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-10-11 12:47:22,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:22,870 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-10-11 12:47:22,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:22,870 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:22,870 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:23,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:23,071 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:23,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:23,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1216195462, now seen corresponding path program 24 times [2020-10-11 12:47:23,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:23,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202810036] [2020-10-11 12:47:23,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:23,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202810036] [2020-10-11 12:47:23,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89200632] [2020-10-11 12:47:23,194 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:23,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 12:47:23,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:23,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:23,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:23,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:23,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:23,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161864076] [2020-10-11 12:47:23,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:23,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:23,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:23,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:23,417 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-10-11 12:47:23,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:23,547 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-11 12:47:23,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:47:23,548 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-11 12:47:23,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:23,549 INFO L225 Difference]: With dead ends: 195 [2020-10-11 12:47:23,549 INFO L226 Difference]: Without dead ends: 192 [2020-10-11 12:47:23,550 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-11 12:47:23,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-11 12:47:23,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-10-11 12:47:23,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-11 12:47:23,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-10-11 12:47:23,553 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-10-11 12:47:23,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:23,553 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-10-11 12:47:23,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:23,553 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-10-11 12:47:23,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:23,553 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:23,554 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:23,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:23,754 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:23,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:23,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1237644982, now seen corresponding path program 25 times [2020-10-11 12:47:23,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:23,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306527023] [2020-10-11 12:47:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:23,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306527023] [2020-10-11 12:47:23,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959658245] [2020-10-11 12:47:23,875 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:23,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:23,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:24,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:24,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:24,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629112958] [2020-10-11 12:47:24,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:24,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:24,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:24,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:24,088 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-10-11 12:47:24,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:24,264 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-10-11 12:47:24,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:47:24,265 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-11 12:47:24,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:24,266 INFO L225 Difference]: With dead ends: 194 [2020-10-11 12:47:24,266 INFO L226 Difference]: Without dead ends: 191 [2020-10-11 12:47:24,266 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:47:24,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-11 12:47:24,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-10-11 12:47:24,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-11 12:47:24,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-10-11 12:47:24,270 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-10-11 12:47:24,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:24,270 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-10-11 12:47:24,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:24,270 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-10-11 12:47:24,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:24,271 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:24,271 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:24,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:24,479 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:24,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:24,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1238336902, now seen corresponding path program 26 times [2020-10-11 12:47:24,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:24,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143332129] [2020-10-11 12:47:24,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:24,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143332129] [2020-10-11 12:47:24,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027424465] [2020-10-11 12:47:24,592 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:24,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:47:24,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:24,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:24,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:24,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:24,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:24,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578877991] [2020-10-11 12:47:24,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:24,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:24,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:24,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:24,811 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-10-11 12:47:25,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:25,026 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-10-11 12:47:25,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:47:25,027 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-11 12:47:25,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:25,028 INFO L225 Difference]: With dead ends: 193 [2020-10-11 12:47:25,029 INFO L226 Difference]: Without dead ends: 190 [2020-10-11 12:47:25,029 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-11 12:47:25,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-11 12:47:25,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-10-11 12:47:25,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-11 12:47:25,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-10-11 12:47:25,033 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-10-11 12:47:25,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:25,033 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-10-11 12:47:25,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:25,033 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-10-11 12:47:25,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:25,033 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:25,033 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:25,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-10-11 12:47:25,234 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:25,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:25,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1238359222, now seen corresponding path program 27 times [2020-10-11 12:47:25,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:25,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900880083] [2020-10-11 12:47:25,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:25,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900880083] [2020-10-11 12:47:25,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415580337] [2020-10-11 12:47:25,339 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:25,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 12:47:25,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:25,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:25,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:25,558 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:47:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:25,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:25,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:25,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728041716] [2020-10-11 12:47:25,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:25,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:25,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:25,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:25,574 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-10-11 12:47:25,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:25,840 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-11 12:47:25,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:47:25,841 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-11 12:47:25,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:25,843 INFO L225 Difference]: With dead ends: 202 [2020-10-11 12:47:25,843 INFO L226 Difference]: Without dead ends: 196 [2020-10-11 12:47:25,843 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:47:25,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-11 12:47:25,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-10-11 12:47:25,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-11 12:47:25,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-10-11 12:47:25,847 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-10-11 12:47:25,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:25,847 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-10-11 12:47:25,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:25,848 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-10-11 12:47:25,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:25,848 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:25,848 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:26,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-11 12:47:26,058 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:26,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:26,059 INFO L82 PathProgramCache]: Analyzing trace with hash 2094057644, now seen corresponding path program 113 times [2020-10-11 12:47:26,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:26,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042353723] [2020-10-11 12:47:26,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:26,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042353723] [2020-10-11 12:47:26,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007123107] [2020-10-11 12:47:26,175 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:26,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:47:26,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:26,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:26,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:26,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:26,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:26,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993082169] [2020-10-11 12:47:26,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:26,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:26,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:26,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:26,416 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-10-11 12:47:26,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:26,476 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-10-11 12:47:26,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:47:26,477 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:26,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:26,477 INFO L225 Difference]: With dead ends: 188 [2020-10-11 12:47:26,477 INFO L226 Difference]: Without dead ends: 186 [2020-10-11 12:47:26,478 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:26,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-11 12:47:26,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-10-11 12:47:26,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-11 12:47:26,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-10-11 12:47:26,481 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-10-11 12:47:26,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:26,481 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-10-11 12:47:26,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:26,481 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-10-11 12:47:26,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:26,482 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:26,482 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:26,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-11 12:47:26,682 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:26,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:26,683 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 114 times [2020-10-11 12:47:26,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:26,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045718781] [2020-10-11 12:47:26,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:26,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045718781] [2020-10-11 12:47:26,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561252250] [2020-10-11 12:47:26,809 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:26,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:47:26,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:26,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:26,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:27,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:27,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:27,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:27,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051314906] [2020-10-11 12:47:27,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:27,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:27,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:27,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:27,032 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-10-11 12:47:27,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:27,267 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-10-11 12:47:27,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:47:27,268 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:27,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:27,269 INFO L225 Difference]: With dead ends: 199 [2020-10-11 12:47:27,269 INFO L226 Difference]: Without dead ends: 197 [2020-10-11 12:47:27,269 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-11 12:47:27,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-11 12:47:27,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-10-11 12:47:27,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-11 12:47:27,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-11 12:47:27,273 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-11 12:47:27,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:27,274 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-11 12:47:27,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:27,274 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-11 12:47:27,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:27,274 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:27,274 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:27,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-11 12:47:27,483 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:27,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:27,483 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 115 times [2020-10-11 12:47:27,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:27,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548383861] [2020-10-11 12:47:27,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:27,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:27,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:27,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548383861] [2020-10-11 12:47:27,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494361100] [2020-10-11 12:47:27,606 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:27,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:27,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:27,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:27,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:27,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:27,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565810315] [2020-10-11 12:47:27,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:27,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:27,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:27,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:27,907 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-11 12:47:28,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:28,205 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-11 12:47:28,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:47:28,206 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:28,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:28,206 INFO L225 Difference]: With dead ends: 210 [2020-10-11 12:47:28,206 INFO L226 Difference]: Without dead ends: 208 [2020-10-11 12:47:28,206 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:47:28,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-11 12:47:28,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-10-11 12:47:28,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-11 12:47:28,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-10-11 12:47:28,209 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-10-11 12:47:28,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:28,209 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-10-11 12:47:28,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:28,210 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-10-11 12:47:28,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:28,210 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:28,210 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:28,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-11 12:47:28,411 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:28,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:28,411 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 116 times [2020-10-11 12:47:28,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:28,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903788165] [2020-10-11 12:47:28,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:28,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903788165] [2020-10-11 12:47:28,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563691116] [2020-10-11 12:47:28,532 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:28,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:47:28,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:28,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:28,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:30,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:30,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:30,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581501728] [2020-10-11 12:47:30,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:30,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:30,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:30,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:30,449 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-10-11 12:47:30,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:30,790 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-11 12:47:30,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:47:30,791 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:30,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:30,791 INFO L225 Difference]: With dead ends: 210 [2020-10-11 12:47:30,792 INFO L226 Difference]: Without dead ends: 208 [2020-10-11 12:47:30,792 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:47:30,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-11 12:47:30,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-10-11 12:47:30,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-11 12:47:30,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-11 12:47:30,796 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-11 12:47:30,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:30,796 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-11 12:47:30,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:30,796 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-11 12:47:30,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:30,796 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:30,797 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:30,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-10-11 12:47:31,000 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:31,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:31,000 INFO L82 PathProgramCache]: Analyzing trace with hash 2094982126, now seen corresponding path program 117 times [2020-10-11 12:47:31,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:31,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333100726] [2020-10-11 12:47:31,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:31,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333100726] [2020-10-11 12:47:31,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736154282] [2020-10-11 12:47:31,120 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:31,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:47:31,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:31,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:31,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:34,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:34,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:34,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:34,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627908204] [2020-10-11 12:47:34,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:34,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:34,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:34,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-10-11 12:47:34,145 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-11 12:47:38,371 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-11 12:47:38,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:38,632 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-11 12:47:38,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:47:38,633 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:38,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:38,633 INFO L225 Difference]: With dead ends: 218 [2020-10-11 12:47:38,633 INFO L226 Difference]: Without dead ends: 216 [2020-10-11 12:47:38,633 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-10-11 12:47:38,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-11 12:47:38,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-11 12:47:38,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-11 12:47:38,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-11 12:47:38,636 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-11 12:47:38,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:38,636 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-11 12:47:38,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:38,636 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-11 12:47:38,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:38,636 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:38,636 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:38,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:38,837 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:38,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:38,838 INFO L82 PathProgramCache]: Analyzing trace with hash 2095010956, now seen corresponding path program 118 times [2020-10-11 12:47:38,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:38,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547983475] [2020-10-11 12:47:38,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:38,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547983475] [2020-10-11 12:47:38,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708318320] [2020-10-11 12:47:38,976 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:39,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:47:39,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:39,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:39,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:39,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:39,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:39,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357943568] [2020-10-11 12:47:39,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:39,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:39,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:39,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:39,452 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-11 12:47:39,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:39,996 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-10-11 12:47:39,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:47:39,997 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:39,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:39,998 INFO L225 Difference]: With dead ends: 212 [2020-10-11 12:47:39,998 INFO L226 Difference]: Without dead ends: 210 [2020-10-11 12:47:39,999 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:47:39,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-11 12:47:40,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-10-11 12:47:40,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-11 12:47:40,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-10-11 12:47:40,004 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-10-11 12:47:40,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:40,004 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-10-11 12:47:40,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:40,004 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-10-11 12:47:40,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:40,005 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:40,005 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:40,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:40,217 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:40,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:40,218 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 119 times [2020-10-11 12:47:40,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:40,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8595996] [2020-10-11 12:47:40,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:40,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:40,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8595996] [2020-10-11 12:47:40,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163478211] [2020-10-11 12:47:40,333 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:40,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:47:40,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:40,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:40,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:40,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:40,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:40,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:40,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470722533] [2020-10-11 12:47:40,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:40,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:40,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:40,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:40,557 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-10-11 12:47:40,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:40,912 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-11 12:47:40,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:47:40,912 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:40,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:40,913 INFO L225 Difference]: With dead ends: 212 [2020-10-11 12:47:40,913 INFO L226 Difference]: Without dead ends: 210 [2020-10-11 12:47:40,913 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:47:40,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-11 12:47:40,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-10-11 12:47:40,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-11 12:47:40,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-11 12:47:40,916 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-11 12:47:40,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:40,916 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-11 12:47:40,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:40,917 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-11 12:47:40,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:40,917 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:40,917 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:41,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:41,118 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:41,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:41,118 INFO L82 PathProgramCache]: Analyzing trace with hash 2122687756, now seen corresponding path program 120 times [2020-10-11 12:47:41,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:41,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388073258] [2020-10-11 12:47:41,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:41,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388073258] [2020-10-11 12:47:41,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701055631] [2020-10-11 12:47:41,230 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:41,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:47:41,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:41,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:41,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:41,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:41,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:41,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277129276] [2020-10-11 12:47:41,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:41,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:41,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:41,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:41,460 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-11 12:47:41,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:41,846 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-10-11 12:47:41,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:47:41,846 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:41,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:41,847 INFO L225 Difference]: With dead ends: 224 [2020-10-11 12:47:41,847 INFO L226 Difference]: Without dead ends: 222 [2020-10-11 12:47:41,847 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:47:41,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-11 12:47:41,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-10-11 12:47:41,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-11 12:47:41,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-11 12:47:41,851 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-11 12:47:41,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:41,851 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-11 12:47:41,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:41,851 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-11 12:47:41,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:41,852 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:41,852 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:42,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:42,054 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:42,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:42,055 INFO L82 PathProgramCache]: Analyzing trace with hash 2122716586, now seen corresponding path program 121 times [2020-10-11 12:47:42,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:42,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426549482] [2020-10-11 12:47:42,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:42,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426549482] [2020-10-11 12:47:42,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166155452] [2020-10-11 12:47:42,173 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:42,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:42,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:42,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:42,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:42,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110901461] [2020-10-11 12:47:42,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:42,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:42,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:42,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:42,379 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-11 12:47:42,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:42,702 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-10-11 12:47:42,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:47:42,703 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:42,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:42,703 INFO L225 Difference]: With dead ends: 218 [2020-10-11 12:47:42,703 INFO L226 Difference]: Without dead ends: 216 [2020-10-11 12:47:42,704 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:47:42,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-11 12:47:42,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-11 12:47:42,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-11 12:47:42,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-11 12:47:42,707 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-11 12:47:42,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:42,707 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-11 12:47:42,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:42,707 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-11 12:47:42,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:42,707 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:42,707 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:42,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:42,908 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:42,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:42,909 INFO L82 PathProgramCache]: Analyzing trace with hash 2123641068, now seen corresponding path program 122 times [2020-10-11 12:47:42,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:42,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930736199] [2020-10-11 12:47:42,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:43,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930736199] [2020-10-11 12:47:43,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371385313] [2020-10-11 12:47:43,023 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:43,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:47:43,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:43,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:43,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:43,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:43,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:43,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050444672] [2020-10-11 12:47:43,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:43,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:43,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:43,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:43,245 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-11 12:47:43,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:43,531 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-10-11 12:47:43,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:47:43,532 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:43,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:43,532 INFO L225 Difference]: With dead ends: 206 [2020-10-11 12:47:43,533 INFO L226 Difference]: Without dead ends: 204 [2020-10-11 12:47:43,533 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:47:43,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-11 12:47:43,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-10-11 12:47:43,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-11 12:47:43,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-10-11 12:47:43,536 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-10-11 12:47:43,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:43,536 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-10-11 12:47:43,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:43,536 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-10-11 12:47:43,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:43,537 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:43,537 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:43,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-11 12:47:43,738 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:43,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:43,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 123 times [2020-10-11 12:47:43,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:43,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117261039] [2020-10-11 12:47:43,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:43,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117261039] [2020-10-11 12:47:43,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844342136] [2020-10-11 12:47:43,859 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:43,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 12:47:43,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:43,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:43,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:44,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:44,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:44,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:44,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924129079] [2020-10-11 12:47:44,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:44,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:44,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:44,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:44,069 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-10-11 12:47:44,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:44,346 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-10-11 12:47:44,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:47:44,346 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:44,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:44,347 INFO L225 Difference]: With dead ends: 207 [2020-10-11 12:47:44,347 INFO L226 Difference]: Without dead ends: 205 [2020-10-11 12:47:44,347 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:47:44,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-11 12:47:44,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-10-11 12:47:44,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-11 12:47:44,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-10-11 12:47:44,351 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-10-11 12:47:44,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:44,351 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-10-11 12:47:44,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:44,351 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-10-11 12:47:44,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:44,351 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:44,351 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:44,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-11 12:47:44,552 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:44,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:44,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405010, now seen corresponding path program 124 times [2020-10-11 12:47:44,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:44,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711516331] [2020-10-11 12:47:44,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:44,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711516331] [2020-10-11 12:47:44,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462142084] [2020-10-11 12:47:44,669 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:44,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:47:44,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:44,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:44,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:44,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:44,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:44,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851174241] [2020-10-11 12:47:44,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:44,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:44,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:44,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:44,891 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-10-11 12:47:45,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:45,209 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-10-11 12:47:45,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:47:45,210 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:45,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:45,210 INFO L225 Difference]: With dead ends: 217 [2020-10-11 12:47:45,210 INFO L226 Difference]: Without dead ends: 215 [2020-10-11 12:47:45,210 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:47:45,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-11 12:47:45,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-10-11 12:47:45,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-11 12:47:45,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-10-11 12:47:45,214 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-10-11 12:47:45,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:45,214 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-10-11 12:47:45,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:45,214 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-10-11 12:47:45,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:45,214 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:45,214 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:45,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-11 12:47:45,415 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:45,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:45,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1313376180, now seen corresponding path program 125 times [2020-10-11 12:47:45,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:45,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765907326] [2020-10-11 12:47:45,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:45,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765907326] [2020-10-11 12:47:45,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415164428] [2020-10-11 12:47:45,547 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:45,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:47:45,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:45,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:45,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:45,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:45,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:45,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397894883] [2020-10-11 12:47:45,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:45,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:45,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:45,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:45,866 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-10-11 12:47:46,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:46,266 INFO L93 Difference]: Finished difference Result 223 states and 528 transitions. [2020-10-11 12:47:46,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:47:46,266 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:46,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:46,267 INFO L225 Difference]: With dead ends: 223 [2020-10-11 12:47:46,267 INFO L226 Difference]: Without dead ends: 221 [2020-10-11 12:47:46,267 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:47:46,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-11 12:47:46,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-10-11 12:47:46,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-11 12:47:46,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-10-11 12:47:46,270 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-10-11 12:47:46,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:46,270 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-10-11 12:47:46,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:46,270 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-10-11 12:47:46,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:46,271 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:46,271 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:46,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-11 12:47:46,472 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:46,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:46,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1312481489, now seen corresponding path program 126 times [2020-10-11 12:47:46,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:46,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475188970] [2020-10-11 12:47:46,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:46,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:46,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475188970] [2020-10-11 12:47:46,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340759070] [2020-10-11 12:47:46,584 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:46,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:47:46,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:46,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:46,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:46,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:46,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:46,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038663820] [2020-10-11 12:47:46,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:46,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:46,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:46,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:46,814 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-10-11 12:47:47,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:47,125 INFO L93 Difference]: Finished difference Result 225 states and 531 transitions. [2020-10-11 12:47:47,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:47:47,126 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:47,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:47,127 INFO L225 Difference]: With dead ends: 225 [2020-10-11 12:47:47,127 INFO L226 Difference]: Without dead ends: 223 [2020-10-11 12:47:47,127 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:47:47,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-11 12:47:47,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 161. [2020-10-11 12:47:47,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-11 12:47:47,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-10-11 12:47:47,131 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-10-11 12:47:47,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:47,131 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-10-11 12:47:47,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:47,131 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-10-11 12:47:47,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:47,132 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:47,132 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:47,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:47,332 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:47,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:47,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1284776820, now seen corresponding path program 127 times [2020-10-11 12:47:47,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:47,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604123205] [2020-10-11 12:47:47,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:47,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:47,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604123205] [2020-10-11 12:47:47,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774695560] [2020-10-11 12:47:47,477 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:47,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:47,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:47,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:47,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:47,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818196740] [2020-10-11 12:47:47,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:47,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:47,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:47,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:47,725 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-10-11 12:47:48,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:48,035 INFO L93 Difference]: Finished difference Result 214 states and 509 transitions. [2020-10-11 12:47:48,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:47:48,035 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:48,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:48,036 INFO L225 Difference]: With dead ends: 214 [2020-10-11 12:47:48,036 INFO L226 Difference]: Without dead ends: 212 [2020-10-11 12:47:48,036 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:47:48,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-11 12:47:48,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-10-11 12:47:48,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-11 12:47:48,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-10-11 12:47:48,039 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-10-11 12:47:48,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:48,039 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-10-11 12:47:48,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:48,040 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-10-11 12:47:48,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:48,040 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:48,040 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:48,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:48,241 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:48,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:48,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1283823508, now seen corresponding path program 128 times [2020-10-11 12:47:48,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:48,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158137518] [2020-10-11 12:47:48,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:48,405 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:48,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158137518] [2020-10-11 12:47:48,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517724089] [2020-10-11 12:47:48,406 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:48,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:47:48,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:48,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:48,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:48,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:48,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:48,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113745383] [2020-10-11 12:47:48,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:48,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:48,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:48,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:48,639 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-10-11 12:47:48,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:48,853 INFO L93 Difference]: Finished difference Result 203 states and 486 transitions. [2020-10-11 12:47:48,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:47:48,854 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:48,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:48,854 INFO L225 Difference]: With dead ends: 203 [2020-10-11 12:47:48,854 INFO L226 Difference]: Without dead ends: 201 [2020-10-11 12:47:48,855 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-11 12:47:48,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-11 12:47:48,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2020-10-11 12:47:48,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-11 12:47:48,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-10-11 12:47:48,858 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-10-11 12:47:48,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:48,858 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-10-11 12:47:48,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:48,858 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-10-11 12:47:48,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:48,859 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:48,859 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:49,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-10-11 12:47:49,060 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:49,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:49,060 INFO L82 PathProgramCache]: Analyzing trace with hash 291274206, now seen corresponding path program 129 times [2020-10-11 12:47:49,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:49,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282008548] [2020-10-11 12:47:49,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:49,237 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:49,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282008548] [2020-10-11 12:47:49,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797192069] [2020-10-11 12:47:49,237 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:49,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:47:49,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:49,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:49,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:49,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:49,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:49,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:49,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081512348] [2020-10-11 12:47:49,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:49,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:49,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:49,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:49,460 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-10-11 12:47:49,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:49,547 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-11 12:47:49,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:47:49,547 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:49,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:49,548 INFO L225 Difference]: With dead ends: 212 [2020-10-11 12:47:49,548 INFO L226 Difference]: Without dead ends: 210 [2020-10-11 12:47:49,548 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:47:49,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-11 12:47:49,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-10-11 12:47:49,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-11 12:47:49,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-10-11 12:47:49,552 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-10-11 12:47:49,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:49,552 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-10-11 12:47:49,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:49,552 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-10-11 12:47:49,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:49,552 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:49,553 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:49,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:49,753 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:49,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:49,754 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 130 times [2020-10-11 12:47:49,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:49,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841993479] [2020-10-11 12:47:49,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:49,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841993479] [2020-10-11 12:47:49,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589124156] [2020-10-11 12:47:49,937 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:49,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:47:49,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:49,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:49,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:50,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:50,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:50,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111391287] [2020-10-11 12:47:50,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:50,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:50,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:50,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:50,210 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-10-11 12:47:50,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:50,485 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-10-11 12:47:50,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:47:50,485 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:50,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:50,486 INFO L225 Difference]: With dead ends: 217 [2020-10-11 12:47:50,486 INFO L226 Difference]: Without dead ends: 215 [2020-10-11 12:47:50,487 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:47:50,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-11 12:47:50,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-10-11 12:47:50,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:47:50,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-11 12:47:50,491 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-11 12:47:50,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:50,491 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-11 12:47:50,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:50,491 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-11 12:47:50,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:50,492 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:50,492 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:50,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:50,695 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:50,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:50,695 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 131 times [2020-10-11 12:47:50,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:50,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417985045] [2020-10-11 12:47:50,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:50,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:50,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417985045] [2020-10-11 12:47:50,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878766673] [2020-10-11 12:47:50,851 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:50,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:47:50,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:50,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:50,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:51,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:51,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:51,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905711525] [2020-10-11 12:47:51,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:51,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:51,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:51,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:51,151 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-11 12:47:51,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:51,558 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-11 12:47:51,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:47:51,559 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:51,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:51,560 INFO L225 Difference]: With dead ends: 227 [2020-10-11 12:47:51,560 INFO L226 Difference]: Without dead ends: 225 [2020-10-11 12:47:51,560 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:47:51,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-11 12:47:51,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-10-11 12:47:51,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-11 12:47:51,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-10-11 12:47:51,564 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-10-11 12:47:51,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:51,564 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-10-11 12:47:51,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:51,564 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-10-11 12:47:51,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:51,565 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:51,565 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:51,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:51,774 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:51,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:51,775 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 132 times [2020-10-11 12:47:51,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:51,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564817646] [2020-10-11 12:47:51,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:51,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:51,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564817646] [2020-10-11 12:47:51,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684934076] [2020-10-11 12:47:51,908 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:51,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:47:51,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:51,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:51,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:52,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:52,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:52,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739343382] [2020-10-11 12:47:52,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:52,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:52,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:52,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:52,188 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-10-11 12:47:52,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:52,619 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-11 12:47:52,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:47:52,620 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:52,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:52,621 INFO L225 Difference]: With dead ends: 227 [2020-10-11 12:47:52,621 INFO L226 Difference]: Without dead ends: 225 [2020-10-11 12:47:52,621 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:47:52,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-11 12:47:52,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 164. [2020-10-11 12:47:52,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:47:52,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-11 12:47:52,623 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-11 12:47:52,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:52,623 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-11 12:47:52,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:52,623 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-11 12:47:52,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:52,624 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:52,624 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:52,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-10-11 12:47:52,828 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:52,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:52,828 INFO L82 PathProgramCache]: Analyzing trace with hash 292198688, now seen corresponding path program 133 times [2020-10-11 12:47:52,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:52,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606750461] [2020-10-11 12:47:52,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:52,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:52,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606750461] [2020-10-11 12:47:52,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137355117] [2020-10-11 12:47:52,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:53,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:53,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:57,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:57,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:57,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898715279] [2020-10-11 12:47:57,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:57,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:57,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:57,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-10-11 12:47:57,413 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-11 12:48:01,661 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-11 12:48:02,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:02,001 INFO L93 Difference]: Finished difference Result 237 states and 553 transitions. [2020-10-11 12:48:02,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:48:02,002 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:02,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:02,002 INFO L225 Difference]: With dead ends: 237 [2020-10-11 12:48:02,002 INFO L226 Difference]: Without dead ends: 235 [2020-10-11 12:48:02,002 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-10-11 12:48:02,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-11 12:48:02,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-10-11 12:48:02,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:48:02,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-11 12:48:02,006 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-11 12:48:02,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:02,006 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-11 12:48:02,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:02,006 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-11 12:48:02,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:02,006 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:02,006 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:02,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-11 12:48:02,207 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:02,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:02,208 INFO L82 PathProgramCache]: Analyzing trace with hash 292227518, now seen corresponding path program 134 times [2020-10-11 12:48:02,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:02,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039650917] [2020-10-11 12:48:02,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:02,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039650917] [2020-10-11 12:48:02,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223414881] [2020-10-11 12:48:02,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:02,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:48:02,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:02,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:02,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:02,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:02,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:02,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519073973] [2020-10-11 12:48:02,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:02,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:02,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:02,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:02,638 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-11 12:48:03,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:03,114 INFO L93 Difference]: Finished difference Result 229 states and 539 transitions. [2020-10-11 12:48:03,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:48:03,115 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:03,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:03,116 INFO L225 Difference]: With dead ends: 229 [2020-10-11 12:48:03,116 INFO L226 Difference]: Without dead ends: 227 [2020-10-11 12:48:03,116 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:48:03,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-11 12:48:03,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-11 12:48:03,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-11 12:48:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-10-11 12:48:03,120 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-10-11 12:48:03,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:03,120 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-10-11 12:48:03,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:03,120 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-10-11 12:48:03,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:03,120 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:03,120 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:03,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-11 12:48:03,321 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:03,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:03,322 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 135 times [2020-10-11 12:48:03,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:03,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689233861] [2020-10-11 12:48:03,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:03,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:03,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689233861] [2020-10-11 12:48:03,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717902016] [2020-10-11 12:48:03,435 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:03,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:48:03,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:03,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:03,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:03,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:03,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:03,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:03,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158077217] [2020-10-11 12:48:03,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:03,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:03,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:03,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:03,658 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-10-11 12:48:04,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:04,105 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-10-11 12:48:04,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:48:04,106 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:04,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:04,106 INFO L225 Difference]: With dead ends: 225 [2020-10-11 12:48:04,106 INFO L226 Difference]: Without dead ends: 223 [2020-10-11 12:48:04,106 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:48:04,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-11 12:48:04,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-10-11 12:48:04,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:48:04,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-11 12:48:04,109 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-11 12:48:04,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:04,109 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-11 12:48:04,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:04,109 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-11 12:48:04,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:04,109 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:04,109 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:04,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-11 12:48:04,310 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:04,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:04,311 INFO L82 PathProgramCache]: Analyzing trace with hash 319904318, now seen corresponding path program 136 times [2020-10-11 12:48:04,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:04,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609724282] [2020-10-11 12:48:04,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:04,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:04,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609724282] [2020-10-11 12:48:04,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094923476] [2020-10-11 12:48:04,425 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:04,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:48:04,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:04,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:04,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:04,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:04,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:04,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:04,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209619185] [2020-10-11 12:48:04,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:04,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:04,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:04,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:04,685 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-11 12:48:05,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:05,398 INFO L93 Difference]: Finished difference Result 239 states and 557 transitions. [2020-10-11 12:48:05,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:48:05,399 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:05,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:05,400 INFO L225 Difference]: With dead ends: 239 [2020-10-11 12:48:05,400 INFO L226 Difference]: Without dead ends: 237 [2020-10-11 12:48:05,401 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:48:05,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-11 12:48:05,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-11 12:48:05,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:48:05,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-11 12:48:05,406 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-11 12:48:05,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:05,407 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-11 12:48:05,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:05,407 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-11 12:48:05,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:05,408 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:05,408 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:05,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-11 12:48:05,620 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:05,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:05,621 INFO L82 PathProgramCache]: Analyzing trace with hash 319933148, now seen corresponding path program 137 times [2020-10-11 12:48:05,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:05,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947585884] [2020-10-11 12:48:05,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:05,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947585884] [2020-10-11 12:48:05,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063131906] [2020-10-11 12:48:05,733 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:05,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:48:05,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:05,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:05,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:05,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:05,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:05,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101316616] [2020-10-11 12:48:05,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:05,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:05,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:05,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:05,943 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-11 12:48:06,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:06,327 INFO L93 Difference]: Finished difference Result 234 states and 550 transitions. [2020-10-11 12:48:06,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:48:06,328 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:06,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:06,328 INFO L225 Difference]: With dead ends: 234 [2020-10-11 12:48:06,329 INFO L226 Difference]: Without dead ends: 232 [2020-10-11 12:48:06,329 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:48:06,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-11 12:48:06,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2020-10-11 12:48:06,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:48:06,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-11 12:48:06,332 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-11 12:48:06,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:06,332 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-11 12:48:06,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:06,333 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-11 12:48:06,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:06,334 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:06,334 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:06,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-10-11 12:48:06,544 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:06,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:06,544 INFO L82 PathProgramCache]: Analyzing trace with hash 320857630, now seen corresponding path program 138 times [2020-10-11 12:48:06,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:06,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341279963] [2020-10-11 12:48:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:06,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341279963] [2020-10-11 12:48:06,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198454143] [2020-10-11 12:48:06,649 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:06,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:48:06,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:06,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:06,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:06,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:06,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:06,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:06,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211982414] [2020-10-11 12:48:06,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:06,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:06,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:06,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:06,874 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-11 12:48:07,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:07,188 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-10-11 12:48:07,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:48:07,189 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:07,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:07,190 INFO L225 Difference]: With dead ends: 218 [2020-10-11 12:48:07,190 INFO L226 Difference]: Without dead ends: 216 [2020-10-11 12:48:07,190 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:48:07,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-11 12:48:07,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-10-11 12:48:07,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-11 12:48:07,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-10-11 12:48:07,193 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-10-11 12:48:07,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:07,193 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-10-11 12:48:07,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:07,194 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-10-11 12:48:07,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:07,194 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:07,194 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:07,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:07,395 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:07,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:07,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1429448084, now seen corresponding path program 139 times [2020-10-11 12:48:07,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:07,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887261273] [2020-10-11 12:48:07,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:07,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:07,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887261273] [2020-10-11 12:48:07,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486937279] [2020-10-11 12:48:07,572 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:07,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:07,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:07,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:07,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:07,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:07,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426054790] [2020-10-11 12:48:07,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:07,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:07,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:07,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:07,881 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-10-11 12:48:08,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:08,033 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-10-11 12:48:08,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:48:08,034 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:08,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:08,035 INFO L225 Difference]: With dead ends: 208 [2020-10-11 12:48:08,035 INFO L226 Difference]: Without dead ends: 206 [2020-10-11 12:48:08,035 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:48:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-11 12:48:08,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-10-11 12:48:08,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-11 12:48:08,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-10-11 12:48:08,039 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-10-11 12:48:08,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:08,039 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-10-11 12:48:08,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:08,039 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-10-11 12:48:08,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:08,040 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:08,040 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:08,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:08,249 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:08,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:08,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 140 times [2020-10-11 12:48:08,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:08,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475163576] [2020-10-11 12:48:08,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:08,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475163576] [2020-10-11 12:48:08,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238535987] [2020-10-11 12:48:08,392 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:08,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:48:08,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:08,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:08,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:08,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:08,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:08,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:08,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230351688] [2020-10-11 12:48:08,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:08,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:08,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:08,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:08,598 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-10-11 12:48:08,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:08,888 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-10-11 12:48:08,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:48:08,889 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:08,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:08,890 INFO L225 Difference]: With dead ends: 229 [2020-10-11 12:48:08,890 INFO L226 Difference]: Without dead ends: 227 [2020-10-11 12:48:08,890 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:48:08,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-11 12:48:08,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-10-11 12:48:08,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:48:08,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-11 12:48:08,894 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-11 12:48:08,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:08,894 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-11 12:48:08,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:08,894 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-11 12:48:08,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:08,894 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:08,894 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:09,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:09,095 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:09,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:09,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 141 times [2020-10-11 12:48:09,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:09,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011590852] [2020-10-11 12:48:09,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:09,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011590852] [2020-10-11 12:48:09,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442195505] [2020-10-11 12:48:09,224 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:09,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:48:09,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:09,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:09,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:09,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:09,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:09,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:09,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846008564] [2020-10-11 12:48:09,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:09,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:09,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:09,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:09,477 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-11 12:48:09,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:09,840 INFO L93 Difference]: Finished difference Result 235 states and 548 transitions. [2020-10-11 12:48:09,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:48:09,841 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:09,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:09,841 INFO L225 Difference]: With dead ends: 235 [2020-10-11 12:48:09,841 INFO L226 Difference]: Without dead ends: 233 [2020-10-11 12:48:09,842 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:48:09,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-11 12:48:09,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2020-10-11 12:48:09,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-11 12:48:09,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-10-11 12:48:09,845 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-10-11 12:48:09,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:09,845 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-10-11 12:48:09,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:09,845 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-10-11 12:48:09,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:09,846 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:09,846 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:10,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:10,046 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:10,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:10,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 142 times [2020-10-11 12:48:10,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:10,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038641085] [2020-10-11 12:48:10,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:10,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:10,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038641085] [2020-10-11 12:48:10,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646581967] [2020-10-11 12:48:10,162 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:10,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:48:10,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:10,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:10,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:10,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:10,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:10,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385843389] [2020-10-11 12:48:10,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:10,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:10,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:10,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:10,433 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 17 states. [2020-10-11 12:48:10,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:10,883 INFO L93 Difference]: Finished difference Result 233 states and 544 transitions. [2020-10-11 12:48:10,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:48:10,883 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:10,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:10,884 INFO L225 Difference]: With dead ends: 233 [2020-10-11 12:48:10,884 INFO L226 Difference]: Without dead ends: 231 [2020-10-11 12:48:10,884 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:48:10,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-11 12:48:10,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-10-11 12:48:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:48:10,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-11 12:48:10,888 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-11 12:48:10,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:10,888 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-11 12:48:10,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:10,889 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-11 12:48:10,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:10,889 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:10,889 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:11,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:11,097 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:11,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:11,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1428523602, now seen corresponding path program 143 times [2020-10-11 12:48:11,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:11,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58117358] [2020-10-11 12:48:11,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:11,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58117358] [2020-10-11 12:48:11,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058757534] [2020-10-11 12:48:11,218 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:11,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:48:11,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:11,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:11,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:15,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:15,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:15,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165614154] [2020-10-11 12:48:15,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:15,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:15,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:15,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-10-11 12:48:15,927 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-11 12:48:20,195 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-11 12:48:20,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:20,553 INFO L93 Difference]: Finished difference Result 241 states and 560 transitions. [2020-10-11 12:48:20,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:48:20,554 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:20,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:20,554 INFO L225 Difference]: With dead ends: 241 [2020-10-11 12:48:20,554 INFO L226 Difference]: Without dead ends: 239 [2020-10-11 12:48:20,555 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2020-10-11 12:48:20,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-11 12:48:20,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-10-11 12:48:20,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:48:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 410 transitions. [2020-10-11 12:48:20,557 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 410 transitions. Word has length 14 [2020-10-11 12:48:20,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:20,557 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 410 transitions. [2020-10-11 12:48:20,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:20,557 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 410 transitions. [2020-10-11 12:48:20,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:20,558 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:20,558 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:20,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:20,759 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:20,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:20,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1428494772, now seen corresponding path program 144 times [2020-10-11 12:48:20,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:20,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096070747] [2020-10-11 12:48:20,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:20,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096070747] [2020-10-11 12:48:20,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518903866] [2020-10-11 12:48:20,871 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:20,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:48:20,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:20,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:20,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:21,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:21,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:21,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141407185] [2020-10-11 12:48:21,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:21,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:21,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:21,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:21,169 INFO L87 Difference]: Start difference. First operand 163 states and 410 transitions. Second operand 17 states. [2020-10-11 12:48:21,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:21,646 INFO L93 Difference]: Finished difference Result 233 states and 548 transitions. [2020-10-11 12:48:21,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:48:21,647 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:21,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:21,648 INFO L225 Difference]: With dead ends: 233 [2020-10-11 12:48:21,648 INFO L226 Difference]: Without dead ends: 231 [2020-10-11 12:48:21,648 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:48:21,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-11 12:48:21,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2020-10-11 12:48:21,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-11 12:48:21,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 401 transitions. [2020-10-11 12:48:21,651 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 401 transitions. Word has length 14 [2020-10-11 12:48:21,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:21,652 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 401 transitions. [2020-10-11 12:48:21,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:21,652 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 401 transitions. [2020-10-11 12:48:21,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:21,652 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:21,652 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:21,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-10-11 12:48:21,853 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:21,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:21,853 INFO L82 PathProgramCache]: Analyzing trace with hash -792218594, now seen corresponding path program 145 times [2020-10-11 12:48:21,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:21,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878297594] [2020-10-11 12:48:21,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:22,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:22,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878297594] [2020-10-11 12:48:22,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668378954] [2020-10-11 12:48:22,008 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:22,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:22,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:22,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:22,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:22,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:22,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259533291] [2020-10-11 12:48:22,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:22,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:22,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:22,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:22,224 INFO L87 Difference]: Start difference. First operand 160 states and 401 transitions. Second operand 17 states. [2020-10-11 12:48:22,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:22,372 INFO L93 Difference]: Finished difference Result 204 states and 486 transitions. [2020-10-11 12:48:22,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:48:22,373 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:22,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:22,373 INFO L225 Difference]: With dead ends: 204 [2020-10-11 12:48:22,374 INFO L226 Difference]: Without dead ends: 202 [2020-10-11 12:48:22,374 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-11 12:48:22,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-11 12:48:22,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-10-11 12:48:22,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:48:22,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 413 transitions. [2020-10-11 12:48:22,377 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 413 transitions. Word has length 14 [2020-10-11 12:48:22,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:22,378 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 413 transitions. [2020-10-11 12:48:22,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:22,378 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 413 transitions. [2020-10-11 12:48:22,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:22,378 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:22,378 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:22,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:22,579 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:22,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:22,580 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 146 times [2020-10-11 12:48:22,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:22,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137571774] [2020-10-11 12:48:22,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:22,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:22,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137571774] [2020-10-11 12:48:22,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424516947] [2020-10-11 12:48:22,717 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:22,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:48:22,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:22,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:22,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:22,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:22,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:22,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:22,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355785993] [2020-10-11 12:48:22,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:22,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:22,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:22,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:22,924 INFO L87 Difference]: Start difference. First operand 164 states and 413 transitions. Second operand 17 states. [2020-10-11 12:48:23,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:23,269 INFO L93 Difference]: Finished difference Result 225 states and 527 transitions. [2020-10-11 12:48:23,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:48:23,270 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:23,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:23,271 INFO L225 Difference]: With dead ends: 225 [2020-10-11 12:48:23,271 INFO L226 Difference]: Without dead ends: 223 [2020-10-11 12:48:23,272 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:48:23,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-11 12:48:23,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-10-11 12:48:23,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-11 12:48:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2020-10-11 12:48:23,275 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 14 [2020-10-11 12:48:23,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:23,275 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2020-10-11 12:48:23,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:23,275 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2020-10-11 12:48:23,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:23,276 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:23,276 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:23,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-11 12:48:23,476 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:23,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:23,477 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 147 times [2020-10-11 12:48:23,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:23,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489026762] [2020-10-11 12:48:23,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:23,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:23,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489026762] [2020-10-11 12:48:23,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502357388] [2020-10-11 12:48:23,595 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:23,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:48:23,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:23,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:23,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:23,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:23,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:23,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623135879] [2020-10-11 12:48:23,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:23,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:23,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:23,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:23,886 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 17 states. [2020-10-11 12:48:24,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:24,319 INFO L93 Difference]: Finished difference Result 231 states and 539 transitions. [2020-10-11 12:48:24,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:48:24,321 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:24,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:24,321 INFO L225 Difference]: With dead ends: 231 [2020-10-11 12:48:24,321 INFO L226 Difference]: Without dead ends: 229 [2020-10-11 12:48:24,322 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:48:24,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-11 12:48:24,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 161. [2020-10-11 12:48:24,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-11 12:48:24,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2020-10-11 12:48:24,325 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 14 [2020-10-11 12:48:24,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:24,325 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2020-10-11 12:48:24,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:24,325 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2020-10-11 12:48:24,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:24,326 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:24,326 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:24,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:24,526 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:24,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:24,527 INFO L82 PathProgramCache]: Analyzing trace with hash -771662804, now seen corresponding path program 148 times [2020-10-11 12:48:24,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:24,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143778098] [2020-10-11 12:48:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:24,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143778098] [2020-10-11 12:48:24,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912428208] [2020-10-11 12:48:24,653 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:24,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:48:24,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:24,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:24,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:24,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:24,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:24,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:24,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464597431] [2020-10-11 12:48:24,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:24,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:24,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:24,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:24,888 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 17 states. [2020-10-11 12:48:25,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:25,079 INFO L93 Difference]: Finished difference Result 200 states and 477 transitions. [2020-10-11 12:48:25,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:48:25,080 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:25,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:25,080 INFO L225 Difference]: With dead ends: 200 [2020-10-11 12:48:25,080 INFO L226 Difference]: Without dead ends: 198 [2020-10-11 12:48:25,081 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:48:25,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-11 12:48:25,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 163. [2020-10-11 12:48:25,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:48:25,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 409 transitions. [2020-10-11 12:48:25,083 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 409 transitions. Word has length 14 [2020-10-11 12:48:25,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:25,083 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 409 transitions. [2020-10-11 12:48:25,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:25,083 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 409 transitions. [2020-10-11 12:48:25,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:25,083 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:25,084 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:25,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:25,286 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:25,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:25,287 INFO L82 PathProgramCache]: Analyzing trace with hash -771661843, now seen corresponding path program 149 times [2020-10-11 12:48:25,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:25,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023833839] [2020-10-11 12:48:25,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:25,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:25,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023833839] [2020-10-11 12:48:25,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975684300] [2020-10-11 12:48:25,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:25,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:48:25,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:25,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:25,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:25,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:25,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:25,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816726535] [2020-10-11 12:48:25,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:25,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:25,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:25,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:25,632 INFO L87 Difference]: Start difference. First operand 163 states and 409 transitions. Second operand 17 states. [2020-10-11 12:48:26,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:26,022 INFO L93 Difference]: Finished difference Result 221 states and 518 transitions. [2020-10-11 12:48:26,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:48:26,023 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:26,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:26,023 INFO L225 Difference]: With dead ends: 221 [2020-10-11 12:48:26,024 INFO L226 Difference]: Without dead ends: 219 [2020-10-11 12:48:26,024 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:48:26,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-11 12:48:26,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 162. [2020-10-11 12:48:26,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-11 12:48:26,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 405 transitions. [2020-10-11 12:48:26,027 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 405 transitions. Word has length 14 [2020-10-11 12:48:26,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:26,027 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 405 transitions. [2020-10-11 12:48:26,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:26,027 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 405 transitions. [2020-10-11 12:48:26,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:26,027 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:26,028 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:26,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-10-11 12:48:26,228 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:26,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:26,229 INFO L82 PathProgramCache]: Analyzing trace with hash -770999714, now seen corresponding path program 150 times [2020-10-11 12:48:26,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:26,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301047420] [2020-10-11 12:48:26,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:26,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:26,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301047420] [2020-10-11 12:48:26,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083599841] [2020-10-11 12:48:26,350 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:26,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:48:26,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:26,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 12:48:26,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:26,417 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:26,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:26,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 12:48:26,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516059334] [2020-10-11 12:48:26,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:48:26,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:26,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:48:26,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:48:26,419 INFO L87 Difference]: Start difference. First operand 162 states and 405 transitions. Second operand 11 states. [2020-10-11 12:48:26,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:26,607 INFO L93 Difference]: Finished difference Result 201 states and 476 transitions. [2020-10-11 12:48:26,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:48:26,608 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-11 12:48:26,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:26,609 INFO L225 Difference]: With dead ends: 201 [2020-10-11 12:48:26,609 INFO L226 Difference]: Without dead ends: 199 [2020-10-11 12:48:26,609 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:48:26,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-11 12:48:26,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2020-10-11 12:48:26,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-11 12:48:26,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-11 12:48:26,612 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-11 12:48:26,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:26,612 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-11 12:48:26,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:48:26,613 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-11 12:48:26,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:26,613 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:26,613 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:26,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:26,814 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:26,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:26,814 INFO L82 PathProgramCache]: Analyzing trace with hash -770977394, now seen corresponding path program 151 times [2020-10-11 12:48:26,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:26,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886332096] [2020-10-11 12:48:26,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:26,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:26,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886332096] [2020-10-11 12:48:26,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691393237] [2020-10-11 12:48:26,916 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:26,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:26,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:27,118 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:48:27,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:27,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:27,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:27,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362449601] [2020-10-11 12:48:27,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:27,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:27,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:27,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:27,157 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-11 12:48:27,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:27,667 INFO L93 Difference]: Finished difference Result 226 states and 539 transitions. [2020-10-11 12:48:27,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:48:27,669 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:27,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:27,669 INFO L225 Difference]: With dead ends: 226 [2020-10-11 12:48:27,670 INFO L226 Difference]: Without dead ends: 221 [2020-10-11 12:48:27,670 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:48:27,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-11 12:48:27,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 164. [2020-10-11 12:48:27,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:48:27,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-11 12:48:27,673 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-11 12:48:27,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:27,673 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-11 12:48:27,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:27,673 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-11 12:48:27,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:27,674 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:27,674 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:27,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:27,875 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:27,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:27,875 INFO L82 PathProgramCache]: Analyzing trace with hash -770969923, now seen corresponding path program 152 times [2020-10-11 12:48:27,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:27,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800065726] [2020-10-11 12:48:27,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:27,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:28,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800065726] [2020-10-11 12:48:28,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109749388] [2020-10-11 12:48:28,024 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:28,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:48:28,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:28,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:28,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:28,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:28,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:28,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:28,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797589782] [2020-10-11 12:48:28,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:28,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:28,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:28,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:28,316 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-11 12:48:28,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:28,740 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-11 12:48:28,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:48:28,741 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:28,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:28,741 INFO L225 Difference]: With dead ends: 218 [2020-10-11 12:48:28,741 INFO L226 Difference]: Without dead ends: 216 [2020-10-11 12:48:28,741 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:48:28,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-11 12:48:28,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2020-10-11 12:48:28,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-11 12:48:28,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-11 12:48:28,744 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-11 12:48:28,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:28,744 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-11 12:48:28,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:28,744 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-11 12:48:28,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:28,744 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:28,744 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:28,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:28,945 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:28,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:28,946 INFO L82 PathProgramCache]: Analyzing trace with hash -770948564, now seen corresponding path program 153 times [2020-10-11 12:48:28,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:28,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578538878] [2020-10-11 12:48:28,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:28,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:29,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578538878] [2020-10-11 12:48:29,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828582311] [2020-10-11 12:48:29,057 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:29,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:48:29,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:29,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:29,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:29,271 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:48:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:29,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:29,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:29,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465843893] [2020-10-11 12:48:29,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:29,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:29,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:29,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:29,308 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-11 12:48:30,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:30,053 INFO L93 Difference]: Finished difference Result 248 states and 590 transitions. [2020-10-11 12:48:30,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:48:30,054 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:30,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:30,055 INFO L225 Difference]: With dead ends: 248 [2020-10-11 12:48:30,055 INFO L226 Difference]: Without dead ends: 243 [2020-10-11 12:48:30,055 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:48:30,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-11 12:48:30,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 166. [2020-10-11 12:48:30,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-11 12:48:30,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-11 12:48:30,059 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-11 12:48:30,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:30,060 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-11 12:48:30,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:30,060 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-11 12:48:30,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:30,060 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:30,060 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:30,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:30,263 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:30,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:30,263 INFO L82 PathProgramCache]: Analyzing trace with hash -770947603, now seen corresponding path program 154 times [2020-10-11 12:48:30,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:30,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903391320] [2020-10-11 12:48:30,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:30,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:30,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903391320] [2020-10-11 12:48:30,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143351617] [2020-10-11 12:48:30,389 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:30,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:48:30,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:30,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:30,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:30,619 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:48:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:30,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:30,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:30,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447700268] [2020-10-11 12:48:30,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:30,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:30,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:30,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:30,649 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-11 12:48:31,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:31,256 INFO L93 Difference]: Finished difference Result 238 states and 567 transitions. [2020-10-11 12:48:31,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:48:31,257 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:31,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:31,258 INFO L225 Difference]: With dead ends: 238 [2020-10-11 12:48:31,258 INFO L226 Difference]: Without dead ends: 233 [2020-10-11 12:48:31,259 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:48:31,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-11 12:48:31,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-10-11 12:48:31,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-11 12:48:31,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-10-11 12:48:31,262 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-10-11 12:48:31,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:31,262 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-10-11 12:48:31,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:31,262 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-10-11 12:48:31,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:31,263 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:31,263 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:31,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:31,464 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:31,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:31,464 INFO L82 PathProgramCache]: Analyzing trace with hash -770739283, now seen corresponding path program 155 times [2020-10-11 12:48:31,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:31,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468693480] [2020-10-11 12:48:31,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:31,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468693480] [2020-10-11 12:48:31,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679216750] [2020-10-11 12:48:31,569 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:31,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:48:31,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:31,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:31,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:31,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:31,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:31,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:31,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217461517] [2020-10-11 12:48:31,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:31,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:31,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:31,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:31,888 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-10-11 12:48:32,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:32,381 INFO L93 Difference]: Finished difference Result 235 states and 547 transitions. [2020-10-11 12:48:32,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:48:32,382 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:32,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:32,383 INFO L225 Difference]: With dead ends: 235 [2020-10-11 12:48:32,383 INFO L226 Difference]: Without dead ends: 233 [2020-10-11 12:48:32,383 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:48:32,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-11 12:48:32,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2020-10-11 12:48:32,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:48:32,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-11 12:48:32,387 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-11 12:48:32,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:32,387 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-11 12:48:32,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:32,387 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-11 12:48:32,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:32,388 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:32,388 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:32,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:32,597 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:32,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:32,598 INFO L82 PathProgramCache]: Analyzing trace with hash -770076193, now seen corresponding path program 156 times [2020-10-11 12:48:32,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:32,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767586597] [2020-10-11 12:48:32,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:32,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767586597] [2020-10-11 12:48:32,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286156633] [2020-10-11 12:48:32,708 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:32,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:48:32,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:32,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:32,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:33,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:33,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:33,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570606810] [2020-10-11 12:48:33,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:33,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:33,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:33,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:33,005 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-11 12:48:33,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:33,667 INFO L93 Difference]: Finished difference Result 252 states and 594 transitions. [2020-10-11 12:48:33,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:48:33,668 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:33,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:33,668 INFO L225 Difference]: With dead ends: 252 [2020-10-11 12:48:33,668 INFO L226 Difference]: Without dead ends: 250 [2020-10-11 12:48:33,669 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-10-11 12:48:33,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-11 12:48:33,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 166. [2020-10-11 12:48:33,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-11 12:48:33,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-11 12:48:33,672 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-11 12:48:33,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:33,672 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-11 12:48:33,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:33,673 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-11 12:48:33,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:33,673 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:33,673 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:33,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-11 12:48:33,874 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:33,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:33,874 INFO L82 PathProgramCache]: Analyzing trace with hash -770054834, now seen corresponding path program 157 times [2020-10-11 12:48:33,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:33,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662481501] [2020-10-11 12:48:33,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:33,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:33,995 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:33,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662481501] [2020-10-11 12:48:33,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674366537] [2020-10-11 12:48:33,995 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:34,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:34,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:34,236 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:48:34,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:34,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:34,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:34,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676483524] [2020-10-11 12:48:34,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:34,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:34,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:34,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:34,287 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-11 12:48:35,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:35,137 INFO L93 Difference]: Finished difference Result 258 states and 617 transitions. [2020-10-11 12:48:35,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:48:35,138 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:35,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:35,139 INFO L225 Difference]: With dead ends: 258 [2020-10-11 12:48:35,139 INFO L226 Difference]: Without dead ends: 253 [2020-10-11 12:48:35,139 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:48:35,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-11 12:48:35,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-10-11 12:48:35,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-11 12:48:35,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-11 12:48:35,142 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-11 12:48:35,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:35,143 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-11 12:48:35,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:35,143 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-11 12:48:35,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:35,143 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:35,143 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:35,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-10-11 12:48:35,347 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:35,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:35,348 INFO L82 PathProgramCache]: Analyzing trace with hash -770053873, now seen corresponding path program 158 times [2020-10-11 12:48:35,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:35,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82257217] [2020-10-11 12:48:35,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:35,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:35,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82257217] [2020-10-11 12:48:35,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519399623] [2020-10-11 12:48:35,462 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:35,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:48:35,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:35,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:35,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:37,846 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:48:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:37,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:37,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:37,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770667207] [2020-10-11 12:48:37,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:37,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:37,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:37,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=185, Unknown=1, NotChecked=0, Total=272 [2020-10-11 12:48:37,912 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-11 12:48:42,225 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-11 12:48:46,522 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-11 12:48:47,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:47,317 INFO L93 Difference]: Finished difference Result 287 states and 685 transitions. [2020-10-11 12:48:47,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 12:48:47,318 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:47,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:47,319 INFO L225 Difference]: With dead ends: 287 [2020-10-11 12:48:47,319 INFO L226 Difference]: Without dead ends: 279 [2020-10-11 12:48:47,319 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=370, Invalid=819, Unknown=1, NotChecked=0, Total=1190 [2020-10-11 12:48:47,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-11 12:48:47,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 162. [2020-10-11 12:48:47,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-11 12:48:47,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 400 transitions. [2020-10-11 12:48:47,323 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 400 transitions. Word has length 14 [2020-10-11 12:48:47,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:47,323 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 400 transitions. [2020-10-11 12:48:47,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:47,323 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 400 transitions. [2020-10-11 12:48:47,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:47,324 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:47,324 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:47,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-10-11 12:48:47,527 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:47,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:47,528 INFO L82 PathProgramCache]: Analyzing trace with hash -770025043, now seen corresponding path program 159 times [2020-10-11 12:48:47,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:47,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331929051] [2020-10-11 12:48:47,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:47,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:47,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:47,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331929051] [2020-10-11 12:48:47,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829183542] [2020-10-11 12:48:47,637 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:47,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:48:47,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:47,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:47,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:47,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:48:47,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:47,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:47,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:47,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194367987] [2020-10-11 12:48:47,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:47,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:47,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:47,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:47,933 INFO L87 Difference]: Start difference. First operand 162 states and 400 transitions. Second operand 17 states. [2020-10-11 12:48:48,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:48,812 INFO L93 Difference]: Finished difference Result 260 states and 621 transitions. [2020-10-11 12:48:48,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:48:48,813 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:48,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:48,814 INFO L225 Difference]: With dead ends: 260 [2020-10-11 12:48:48,814 INFO L226 Difference]: Without dead ends: 255 [2020-10-11 12:48:48,815 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 12:48:48,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-11 12:48:48,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 160. [2020-10-11 12:48:48,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-11 12:48:48,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 390 transitions. [2020-10-11 12:48:48,818 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 390 transitions. Word has length 14 [2020-10-11 12:48:48,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:48,818 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 390 transitions. [2020-10-11 12:48:48,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:48,818 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 390 transitions. [2020-10-11 12:48:48,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:48,818 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:48,818 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:49,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:49,019 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:49,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:49,020 INFO L82 PathProgramCache]: Analyzing trace with hash -763589443, now seen corresponding path program 160 times [2020-10-11 12:48:49,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:49,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522299018] [2020-10-11 12:48:49,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:49,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522299018] [2020-10-11 12:48:49,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311243651] [2020-10-11 12:48:49,117 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:49,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:48:49,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:49,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:49,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:49,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:49,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:49,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933397698] [2020-10-11 12:48:49,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:49,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:49,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:49,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:49,413 INFO L87 Difference]: Start difference. First operand 160 states and 390 transitions. Second operand 17 states. [2020-10-11 12:48:50,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:50,084 INFO L93 Difference]: Finished difference Result 235 states and 543 transitions. [2020-10-11 12:48:50,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:48:50,085 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:50,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:50,086 INFO L225 Difference]: With dead ends: 235 [2020-10-11 12:48:50,086 INFO L226 Difference]: Without dead ends: 233 [2020-10-11 12:48:50,086 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:48:50,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-11 12:48:50,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-10-11 12:48:50,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:48:50,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 401 transitions. [2020-10-11 12:48:50,090 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 401 transitions. Word has length 14 [2020-10-11 12:48:50,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:50,090 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 401 transitions. [2020-10-11 12:48:50,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:50,091 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 401 transitions. [2020-10-11 12:48:50,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:50,091 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:50,091 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:50,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:50,292 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:50,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:50,293 INFO L82 PathProgramCache]: Analyzing trace with hash -763588482, now seen corresponding path program 161 times [2020-10-11 12:48:50,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:50,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746950803] [2020-10-11 12:48:50,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:50,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:50,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746950803] [2020-10-11 12:48:50,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220018528] [2020-10-11 12:48:50,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:50,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:48:50,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:50,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:50,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:56,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:56,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:56,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057920870] [2020-10-11 12:48:56,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:56,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:56,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:56,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2020-10-11 12:48:56,174 INFO L87 Difference]: Start difference. First operand 163 states and 401 transitions. Second operand 17 states. [2020-10-11 12:49:00,525 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-11 12:49:08,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:08,992 INFO L93 Difference]: Finished difference Result 241 states and 556 transitions. [2020-10-11 12:49:08,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:49:08,993 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:08,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:08,994 INFO L225 Difference]: With dead ends: 241 [2020-10-11 12:49:08,994 INFO L226 Difference]: Without dead ends: 239 [2020-10-11 12:49:08,994 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=193, Invalid=507, Unknown=2, NotChecked=0, Total=702 [2020-10-11 12:49:08,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-11 12:49:08,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-10-11 12:49:08,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:49:08,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 400 transitions. [2020-10-11 12:49:08,997 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 400 transitions. Word has length 14 [2020-10-11 12:49:08,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:08,998 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 400 transitions. [2020-10-11 12:49:08,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:08,998 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 400 transitions. [2020-10-11 12:49:08,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:08,998 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:08,998 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:09,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-10-11 12:49:09,199 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:09,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:09,199 INFO L82 PathProgramCache]: Analyzing trace with hash -763559652, now seen corresponding path program 162 times [2020-10-11 12:49:09,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:09,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240948028] [2020-10-11 12:49:09,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:09,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240948028] [2020-10-11 12:49:09,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088606636] [2020-10-11 12:49:09,314 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:49:09,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:49:09,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:09,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:09,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:09,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:09,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:09,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362984307] [2020-10-11 12:49:09,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:09,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:09,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:09,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:09,614 INFO L87 Difference]: Start difference. First operand 163 states and 400 transitions. Second operand 17 states. [2020-10-11 12:49:10,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:10,157 INFO L93 Difference]: Finished difference Result 235 states and 546 transitions. [2020-10-11 12:49:10,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:49:10,158 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:10,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:10,159 INFO L225 Difference]: With dead ends: 235 [2020-10-11 12:49:10,159 INFO L226 Difference]: Without dead ends: 233 [2020-10-11 12:49:10,159 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:49:10,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-11 12:49:10,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-10-11 12:49:10,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-11 12:49:10,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-10-11 12:49:10,163 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-10-11 12:49:10,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:10,163 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-10-11 12:49:10,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:10,163 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-10-11 12:49:10,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:10,163 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:10,163 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:10,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:49:10,364 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:10,365 INFO L82 PathProgramCache]: Analyzing trace with hash -743033653, now seen corresponding path program 163 times [2020-10-11 12:49:10,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:10,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402384878] [2020-10-11 12:49:10,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:10,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:10,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402384878] [2020-10-11 12:49:10,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631900572] [2020-10-11 12:49:10,488 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:49:10,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:10,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:10,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:10,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:10,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:10,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:10,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524750579] [2020-10-11 12:49:10,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:10,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:10,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:10,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:10,786 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-10-11 12:49:11,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:11,650 INFO L93 Difference]: Finished difference Result 254 states and 587 transitions. [2020-10-11 12:49:11,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:49:11,651 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:11,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:11,651 INFO L225 Difference]: With dead ends: 254 [2020-10-11 12:49:11,652 INFO L226 Difference]: Without dead ends: 252 [2020-10-11 12:49:11,652 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:49:11,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-11 12:49:11,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 164. [2020-10-11 12:49:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:49:11,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 405 transitions. [2020-10-11 12:49:11,654 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 405 transitions. Word has length 14 [2020-10-11 12:49:11,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:11,654 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 405 transitions. [2020-10-11 12:49:11,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:11,655 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 405 transitions. [2020-10-11 12:49:11,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:11,655 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:11,655 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:11,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2020-10-11 12:49:11,856 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:11,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:11,856 INFO L82 PathProgramCache]: Analyzing trace with hash -743032692, now seen corresponding path program 164 times [2020-10-11 12:49:11,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:11,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378622778] [2020-10-11 12:49:11,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:11,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:11,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378622778] [2020-10-11 12:49:11,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376491006] [2020-10-11 12:49:11,974 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:49:12,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:49:12,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:12,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:12,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:12,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:12,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:12,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835403891] [2020-10-11 12:49:12,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:12,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:12,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:12,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:12,325 INFO L87 Difference]: Start difference. First operand 164 states and 405 transitions. Second operand 17 states. [2020-10-11 12:49:16,745 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-11 12:49:31,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:31,481 INFO L93 Difference]: Finished difference Result 264 states and 610 transitions. [2020-10-11 12:49:31,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:49:31,481 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:31,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:31,482 INFO L225 Difference]: With dead ends: 264 [2020-10-11 12:49:31,482 INFO L226 Difference]: Without dead ends: 262 [2020-10-11 12:49:31,482 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=289, Invalid=699, Unknown=4, NotChecked=0, Total=992 [2020-10-11 12:49:31,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-11 12:49:31,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 165. [2020-10-11 12:49:31,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-11 12:49:31,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-10-11 12:49:31,486 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-10-11 12:49:31,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:31,486 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-10-11 12:49:31,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:31,486 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-10-11 12:49:31,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:31,486 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:31,486 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:31,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:49:31,687 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:31,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:31,688 INFO L82 PathProgramCache]: Analyzing trace with hash -742370563, now seen corresponding path program 165 times [2020-10-11 12:49:31,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:31,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236738364] [2020-10-11 12:49:31,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:31,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236738364] [2020-10-11 12:49:31,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566433884] [2020-10-11 12:49:31,813 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:49:31,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:49:31,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:31,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:31,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:33,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:33,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:33,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142581069] [2020-10-11 12:49:33,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:33,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:33,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:33,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:33,282 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-10-11 12:49:34,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:34,145 INFO L93 Difference]: Finished difference Result 255 states and 604 transitions. [2020-10-11 12:49:34,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 12:49:34,147 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:34,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:34,147 INFO L225 Difference]: With dead ends: 255 [2020-10-11 12:49:34,147 INFO L226 Difference]: Without dead ends: 253 [2020-10-11 12:49:34,147 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:49:34,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-11 12:49:34,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-10-11 12:49:34,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-11 12:49:34,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-11 12:49:34,151 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-11 12:49:34,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:34,151 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-11 12:49:34,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:34,152 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-11 12:49:34,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:34,152 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:34,152 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:34,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:49:34,353 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:34,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:34,353 INFO L82 PathProgramCache]: Analyzing trace with hash -742349204, now seen corresponding path program 166 times [2020-10-11 12:49:34,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:34,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258873351] [2020-10-11 12:49:34,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:34,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:34,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258873351] [2020-10-11 12:49:34,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301807026] [2020-10-11 12:49:34,476 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:49:34,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:49:34,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:34,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:34,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:34,749 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:49:34,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:34,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:34,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:34,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585391432] [2020-10-11 12:49:34,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:34,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:34,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:34,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:34,803 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-11 12:49:35,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:35,915 INFO L93 Difference]: Finished difference Result 256 states and 613 transitions. [2020-10-11 12:49:35,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 12:49:35,916 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:35,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:35,917 INFO L225 Difference]: With dead ends: 256 [2020-10-11 12:49:35,917 INFO L226 Difference]: Without dead ends: 251 [2020-10-11 12:49:35,917 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 12:49:35,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-11 12:49:35,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 167. [2020-10-11 12:49:35,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-11 12:49:35,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-11 12:49:35,920 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-11 12:49:35,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:35,920 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-11 12:49:35,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:35,920 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-11 12:49:35,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:35,920 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:35,920 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:36,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-11 12:49:36,121 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:36,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:36,122 INFO L82 PathProgramCache]: Analyzing trace with hash -742348243, now seen corresponding path program 167 times [2020-10-11 12:49:36,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:36,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166073944] [2020-10-11 12:49:36,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:36,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166073944] [2020-10-11 12:49:36,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165662959] [2020-10-11 12:49:36,247 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:49:36,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:49:36,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:36,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:36,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:36,542 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:49:36,544 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:49:36,545 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:49:36,546 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:49:36,548 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:49:36,549 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:49:36,551 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:49:36,553 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:49:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:36,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:36,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:36,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217507417] [2020-10-11 12:49:36,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:36,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:36,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:36,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:36,641 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-11 12:49:38,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:38,296 INFO L93 Difference]: Finished difference Result 279 states and 667 transitions. [2020-10-11 12:49:38,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:49:38,297 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:38,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:38,298 INFO L225 Difference]: With dead ends: 279 [2020-10-11 12:49:38,298 INFO L226 Difference]: Without dead ends: 274 [2020-10-11 12:49:38,298 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 12:49:38,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-11 12:49:38,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 165. [2020-10-11 12:49:38,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-11 12:49:38,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-10-11 12:49:38,308 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-10-11 12:49:38,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:38,308 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-10-11 12:49:38,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:38,308 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-10-11 12:49:38,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:38,309 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:38,309 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:38,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-11 12:49:38,518 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:38,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:38,519 INFO L82 PathProgramCache]: Analyzing trace with hash -742340772, now seen corresponding path program 168 times [2020-10-11 12:49:38,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:38,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343551019] [2020-10-11 12:49:38,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:38,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:38,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343551019] [2020-10-11 12:49:38,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334381217] [2020-10-11 12:49:38,650 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:49:38,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:49:38,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:38,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:38,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:42,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:42,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:42,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416361587] [2020-10-11 12:49:42,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:42,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:42,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:42,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=196, Unknown=1, NotChecked=0, Total=272 [2020-10-11 12:49:42,132 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-10-11 12:49:46,516 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-11 12:49:50,765 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-11 12:49:51,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:51,500 INFO L93 Difference]: Finished difference Result 271 states and 639 transitions. [2020-10-11 12:49:51,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 12:49:51,501 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:51,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:51,502 INFO L225 Difference]: With dead ends: 271 [2020-10-11 12:49:51,502 INFO L226 Difference]: Without dead ends: 269 [2020-10-11 12:49:51,502 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=348, Invalid=841, Unknown=1, NotChecked=0, Total=1190 [2020-10-11 12:49:51,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-11 12:49:51,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 167. [2020-10-11 12:49:51,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-11 12:49:51,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-11 12:49:51,505 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-11 12:49:51,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:51,505 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-11 12:49:51,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:51,505 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-11 12:49:51,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:51,505 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:51,505 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:51,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-11 12:49:51,706 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:51,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:51,707 INFO L82 PathProgramCache]: Analyzing trace with hash -742319413, now seen corresponding path program 169 times [2020-10-11 12:49:51,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:51,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447545465] [2020-10-11 12:49:51,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:51,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447545465] [2020-10-11 12:49:51,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52773745] [2020-10-11 12:49:51,835 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:49:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:51,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:51,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:00,992 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-11 12:50:00,998 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:50:01,000 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:50:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:01,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:01,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:01,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278618310] [2020-10-11 12:50:01,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:01,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:01,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:01,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=179, Unknown=6, NotChecked=0, Total=272 [2020-10-11 12:50:01,066 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-11 12:50:05,444 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-11 12:50:07,567 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-10-11 12:50:11,717 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-11 12:50:18,752 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-10-11 12:50:28,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:28,115 INFO L93 Difference]: Finished difference Result 299 states and 714 transitions. [2020-10-11 12:50:28,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:50:28,117 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:28,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:28,118 INFO L225 Difference]: With dead ends: 299 [2020-10-11 12:50:28,118 INFO L226 Difference]: Without dead ends: 291 [2020-10-11 12:50:28,118 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=434, Invalid=961, Unknown=11, NotChecked=0, Total=1406 [2020-10-11 12:50:28,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-11 12:50:28,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 168. [2020-10-11 12:50:28,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-11 12:50:28,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 421 transitions. [2020-10-11 12:50:28,121 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 421 transitions. Word has length 14 [2020-10-11 12:50:28,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:28,121 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 421 transitions. [2020-10-11 12:50:28,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:28,121 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 421 transitions. [2020-10-11 12:50:28,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:28,122 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:28,122 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:28,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-10-11 12:50:28,322 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:28,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:28,323 INFO L82 PathProgramCache]: Analyzing trace with hash -742318452, now seen corresponding path program 170 times [2020-10-11 12:50:28,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:28,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477631794] [2020-10-11 12:50:28,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:28,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:28,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477631794] [2020-10-11 12:50:28,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282125372] [2020-10-11 12:50:28,461 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:28,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:50:28,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:28,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:28,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:30,829 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:50:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:30,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:30,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:30,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689555139] [2020-10-11 12:50:30,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:30,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:30,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:30,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-10-11 12:50:30,906 INFO L87 Difference]: Start difference. First operand 168 states and 421 transitions. Second operand 17 states. [2020-10-11 12:50:32,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:32,768 INFO L93 Difference]: Finished difference Result 292 states and 701 transitions. [2020-10-11 12:50:32,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:50:32,769 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:32,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:32,770 INFO L225 Difference]: With dead ends: 292 [2020-10-11 12:50:32,770 INFO L226 Difference]: Without dead ends: 284 [2020-10-11 12:50:32,770 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=425, Invalid=980, Unknown=1, NotChecked=0, Total=1406 [2020-10-11 12:50:32,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-11 12:50:32,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 162. [2020-10-11 12:50:32,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-11 12:50:32,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-10-11 12:50:32,774 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-10-11 12:50:32,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:32,774 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-10-11 12:50:32,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:32,774 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-10-11 12:50:32,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:32,775 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:32,775 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:32,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-11 12:50:32,976 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:32,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:32,976 INFO L82 PathProgramCache]: Analyzing trace with hash -742110132, now seen corresponding path program 171 times [2020-10-11 12:50:32,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:32,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910170141] [2020-10-11 12:50:32,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:33,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910170141] [2020-10-11 12:50:33,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614887967] [2020-10-11 12:50:33,116 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:33,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:50:33,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:33,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:33,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:33,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:33,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:33,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973925903] [2020-10-11 12:50:33,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:33,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:33,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:33,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:33,478 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-10-11 12:50:34,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:34,080 INFO L93 Difference]: Finished difference Result 231 states and 545 transitions. [2020-10-11 12:50:34,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:50:34,082 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:34,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:34,082 INFO L225 Difference]: With dead ends: 231 [2020-10-11 12:50:34,082 INFO L226 Difference]: Without dead ends: 229 [2020-10-11 12:50:34,083 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:50:34,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-11 12:50:34,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 162. [2020-10-11 12:50:34,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-11 12:50:34,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-10-11 12:50:34,085 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-10-11 12:50:34,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:34,085 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-10-11 12:50:34,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:34,085 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-10-11 12:50:34,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:34,086 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:34,086 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:34,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2020-10-11 12:50:34,287 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:34,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:34,287 INFO L82 PathProgramCache]: Analyzing trace with hash -741447042, now seen corresponding path program 172 times [2020-10-11 12:50:34,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:34,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021476389] [2020-10-11 12:50:34,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:34,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:34,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021476389] [2020-10-11 12:50:34,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116153918] [2020-10-11 12:50:34,427 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:34,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:50:34,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:34,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:34,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:34,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:34,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:34,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:34,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731048406] [2020-10-11 12:50:34,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:34,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:34,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:34,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:34,812 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-10-11 12:50:35,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:35,811 INFO L93 Difference]: Finished difference Result 250 states and 594 transitions. [2020-10-11 12:50:35,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:50:35,813 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:35,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:35,813 INFO L225 Difference]: With dead ends: 250 [2020-10-11 12:50:35,814 INFO L226 Difference]: Without dead ends: 248 [2020-10-11 12:50:35,814 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:50:35,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-11 12:50:35,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 163. [2020-10-11 12:50:35,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:50:35,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 405 transitions. [2020-10-11 12:50:35,818 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 405 transitions. Word has length 14 [2020-10-11 12:50:35,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:35,818 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 405 transitions. [2020-10-11 12:50:35,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:35,818 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 405 transitions. [2020-10-11 12:50:35,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:35,818 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:35,818 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:36,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:36,019 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:36,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:36,020 INFO L82 PathProgramCache]: Analyzing trace with hash -741424722, now seen corresponding path program 173 times [2020-10-11 12:50:36,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:36,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398161769] [2020-10-11 12:50:36,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:36,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398161769] [2020-10-11 12:50:36,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881686459] [2020-10-11 12:50:36,169 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:36,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:50:36,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:36,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:36,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:36,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:50:36,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:36,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:36,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:36,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650215228] [2020-10-11 12:50:36,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:36,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:36,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:36,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:36,526 INFO L87 Difference]: Start difference. First operand 163 states and 405 transitions. Second operand 17 states. [2020-10-11 12:50:38,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:38,028 INFO L93 Difference]: Finished difference Result 288 states and 686 transitions. [2020-10-11 12:50:38,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:50:38,030 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:38,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:38,030 INFO L225 Difference]: With dead ends: 288 [2020-10-11 12:50:38,031 INFO L226 Difference]: Without dead ends: 283 [2020-10-11 12:50:38,031 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 12:50:38,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-11 12:50:38,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 159. [2020-10-11 12:50:38,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-11 12:50:38,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 388 transitions. [2020-10-11 12:50:38,035 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 388 transitions. Word has length 14 [2020-10-11 12:50:38,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:38,035 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 388 transitions. [2020-10-11 12:50:38,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:38,035 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 388 transitions. [2020-10-11 12:50:38,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:38,036 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:38,036 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:38,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-10-11 12:50:38,236 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:38,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:38,237 INFO L82 PathProgramCache]: Analyzing trace with hash -541944403, now seen corresponding path program 174 times [2020-10-11 12:50:38,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:38,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980807300] [2020-10-11 12:50:38,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:38,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980807300] [2020-10-11 12:50:38,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404492092] [2020-10-11 12:50:38,371 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:38,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:50:38,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:38,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:38,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:38,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:38,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:38,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:38,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022895429] [2020-10-11 12:50:38,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:38,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:38,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:38,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:38,678 INFO L87 Difference]: Start difference. First operand 159 states and 388 transitions. Second operand 17 states. [2020-10-11 12:50:39,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:39,264 INFO L93 Difference]: Finished difference Result 236 states and 544 transitions. [2020-10-11 12:50:39,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:50:39,266 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:39,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:39,266 INFO L225 Difference]: With dead ends: 236 [2020-10-11 12:50:39,267 INFO L226 Difference]: Without dead ends: 234 [2020-10-11 12:50:39,267 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:50:39,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-11 12:50:39,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 163. [2020-10-11 12:50:39,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:50:39,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-11 12:50:39,270 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-11 12:50:39,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:39,271 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-11 12:50:39,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:39,271 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-11 12:50:39,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:39,271 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:39,271 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:39,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:39,472 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:39,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:39,472 INFO L82 PathProgramCache]: Analyzing trace with hash -541943442, now seen corresponding path program 175 times [2020-10-11 12:50:39,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:39,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51178868] [2020-10-11 12:50:39,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:39,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:39,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51178868] [2020-10-11 12:50:39,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305531152] [2020-10-11 12:50:39,619 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:39,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:39,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:39,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:39,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:39,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544364995] [2020-10-11 12:50:39,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:39,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:39,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:39,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:39,940 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-11 12:50:40,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:40,538 INFO L93 Difference]: Finished difference Result 246 states and 565 transitions. [2020-10-11 12:50:40,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:50:40,539 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:40,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:40,540 INFO L225 Difference]: With dead ends: 246 [2020-10-11 12:50:40,540 INFO L226 Difference]: Without dead ends: 244 [2020-10-11 12:50:40,540 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:50:40,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-11 12:50:40,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 163. [2020-10-11 12:50:40,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:50:40,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-11 12:50:40,544 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-11 12:50:40,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:40,544 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-11 12:50:40,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:40,544 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-11 12:50:40,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:40,544 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:40,544 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:40,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:40,745 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:40,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:40,746 INFO L82 PathProgramCache]: Analyzing trace with hash -541914612, now seen corresponding path program 176 times [2020-10-11 12:50:40,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:40,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966142371] [2020-10-11 12:50:40,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:40,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:40,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966142371] [2020-10-11 12:50:40,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097602118] [2020-10-11 12:50:40,886 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:40,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:50:40,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:40,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:40,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:41,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:41,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:41,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938288321] [2020-10-11 12:50:41,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:41,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:41,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:41,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:41,207 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-11 12:50:41,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:41,991 INFO L93 Difference]: Finished difference Result 239 states and 554 transitions. [2020-10-11 12:50:41,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:50:41,993 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:41,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:41,994 INFO L225 Difference]: With dead ends: 239 [2020-10-11 12:50:41,994 INFO L226 Difference]: Without dead ends: 237 [2020-10-11 12:50:41,995 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:50:41,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-11 12:50:41,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-11 12:50:41,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:50:42,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-11 12:50:42,000 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-11 12:50:42,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:42,001 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-11 12:50:42,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:42,001 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-11 12:50:42,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:42,002 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:42,002 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:42,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:42,214 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:42,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:42,215 INFO L82 PathProgramCache]: Analyzing trace with hash -540990130, now seen corresponding path program 177 times [2020-10-11 12:50:42,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:42,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443589458] [2020-10-11 12:50:42,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:42,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443589458] [2020-10-11 12:50:42,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258309811] [2020-10-11 12:50:42,353 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:42,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:50:42,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:42,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:42,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:42,676 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:42,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:42,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:42,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652847041] [2020-10-11 12:50:42,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:42,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:42,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:42,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:42,684 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-11 12:50:43,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:43,172 INFO L93 Difference]: Finished difference Result 229 states and 529 transitions. [2020-10-11 12:50:43,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:50:43,174 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:43,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:43,175 INFO L225 Difference]: With dead ends: 229 [2020-10-11 12:50:43,175 INFO L226 Difference]: Without dead ends: 227 [2020-10-11 12:50:43,175 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:50:43,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-11 12:50:43,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-10-11 12:50:43,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-11 12:50:43,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-10-11 12:50:43,179 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-10-11 12:50:43,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:43,179 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-10-11 12:50:43,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:43,180 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-10-11 12:50:43,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:43,180 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:43,180 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:43,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-11 12:50:43,383 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:43,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:43,383 INFO L82 PathProgramCache]: Analyzing trace with hash 95285087, now seen corresponding path program 178 times [2020-10-11 12:50:43,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:43,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147430124] [2020-10-11 12:50:43,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:43,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:43,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147430124] [2020-10-11 12:50:43,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272042763] [2020-10-11 12:50:43,521 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:43,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:50:43,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:43,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:43,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:43,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:43,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:43,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980792877] [2020-10-11 12:50:43,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:43,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:43,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:43,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:43,817 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-10-11 12:50:44,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:44,780 INFO L93 Difference]: Finished difference Result 261 states and 599 transitions. [2020-10-11 12:50:44,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:50:44,781 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:44,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:44,782 INFO L225 Difference]: With dead ends: 261 [2020-10-11 12:50:44,782 INFO L226 Difference]: Without dead ends: 259 [2020-10-11 12:50:44,782 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 12:50:44,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-11 12:50:44,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 164. [2020-10-11 12:50:44,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:50:44,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 406 transitions. [2020-10-11 12:50:44,786 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 406 transitions. Word has length 14 [2020-10-11 12:50:44,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:44,786 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 406 transitions. [2020-10-11 12:50:44,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:44,786 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 406 transitions. [2020-10-11 12:50:44,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:44,786 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:44,786 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:44,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:44,987 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:44,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:44,988 INFO L82 PathProgramCache]: Analyzing trace with hash 95286048, now seen corresponding path program 179 times [2020-10-11 12:50:44,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:44,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228894149] [2020-10-11 12:50:44,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:45,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228894149] [2020-10-11 12:50:45,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519126435] [2020-10-11 12:50:45,129 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:45,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:50:45,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:45,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:45,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:45,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:45,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:45,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691263812] [2020-10-11 12:50:45,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:45,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:45,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:45,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:45,435 INFO L87 Difference]: Start difference. First operand 164 states and 406 transitions. Second operand 17 states. [2020-10-11 12:50:46,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:46,372 INFO L93 Difference]: Finished difference Result 271 states and 622 transitions. [2020-10-11 12:50:46,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:50:46,373 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:46,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:46,374 INFO L225 Difference]: With dead ends: 271 [2020-10-11 12:50:46,374 INFO L226 Difference]: Without dead ends: 269 [2020-10-11 12:50:46,375 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 12:50:46,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-11 12:50:46,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 166. [2020-10-11 12:50:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-11 12:50:46,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 413 transitions. [2020-10-11 12:50:46,378 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 413 transitions. Word has length 14 [2020-10-11 12:50:46,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:46,378 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 413 transitions. [2020-10-11 12:50:46,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:46,378 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 413 transitions. [2020-10-11 12:50:46,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:46,379 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:46,379 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:46,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-11 12:50:46,590 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:46,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:46,590 INFO L82 PathProgramCache]: Analyzing trace with hash 95314878, now seen corresponding path program 180 times [2020-10-11 12:50:46,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:46,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714245996] [2020-10-11 12:50:46,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:46,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714245996] [2020-10-11 12:50:46,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909074905] [2020-10-11 12:50:46,774 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:46,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:50:46,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:46,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:46,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:47,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:47,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:47,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334274235] [2020-10-11 12:50:47,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:47,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:47,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:47,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:47,121 INFO L87 Difference]: Start difference. First operand 166 states and 413 transitions. Second operand 17 states. [2020-10-11 12:50:47,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:47,909 INFO L93 Difference]: Finished difference Result 253 states and 588 transitions. [2020-10-11 12:50:47,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 12:50:47,910 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:47,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:47,911 INFO L225 Difference]: With dead ends: 253 [2020-10-11 12:50:47,911 INFO L226 Difference]: Without dead ends: 251 [2020-10-11 12:50:47,911 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=274, Invalid=718, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:50:47,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-11 12:50:47,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2020-10-11 12:50:47,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-11 12:50:47,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-10-11 12:50:47,914 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-10-11 12:50:47,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:47,914 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-10-11 12:50:47,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:47,914 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-10-11 12:50:47,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:47,914 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:47,914 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:48,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-11 12:50:48,115 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:48,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:48,116 INFO L82 PathProgramCache]: Analyzing trace with hash 115840877, now seen corresponding path program 181 times [2020-10-11 12:50:48,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:48,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983311824] [2020-10-11 12:50:48,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:48,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:48,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983311824] [2020-10-11 12:50:48,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193723391] [2020-10-11 12:50:48,285 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:48,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:48,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:48,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:48,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:48,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485788] [2020-10-11 12:50:48,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:48,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:48,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:48,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:48,609 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-10-11 12:50:49,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:49,640 INFO L93 Difference]: Finished difference Result 268 states and 622 transitions. [2020-10-11 12:50:49,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:50:49,641 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:49,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:49,642 INFO L225 Difference]: With dead ends: 268 [2020-10-11 12:50:49,642 INFO L226 Difference]: Without dead ends: 266 [2020-10-11 12:50:49,642 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 12:50:49,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-11 12:50:49,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 167. [2020-10-11 12:50:49,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-11 12:50:49,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-11 12:50:49,646 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-11 12:50:49,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:49,646 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-11 12:50:49,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:49,646 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-11 12:50:49,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:49,647 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:49,647 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:49,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:49,848 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:49,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:49,848 INFO L82 PathProgramCache]: Analyzing trace with hash 115841838, now seen corresponding path program 182 times [2020-10-11 12:50:49,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:49,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82802714] [2020-10-11 12:50:49,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:49,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:49,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82802714] [2020-10-11 12:50:49,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789428296] [2020-10-11 12:50:49,968 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:50,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:50:50,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:50,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:50,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:50,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:50,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:50,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354854943] [2020-10-11 12:50:50,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:50,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:50,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:50,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:50,264 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-11 12:50:51,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:51,292 INFO L93 Difference]: Finished difference Result 271 states and 630 transitions. [2020-10-11 12:50:51,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 12:50:51,293 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:51,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:51,294 INFO L225 Difference]: With dead ends: 271 [2020-10-11 12:50:51,294 INFO L226 Difference]: Without dead ends: 269 [2020-10-11 12:50:51,294 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 12:50:51,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-11 12:50:51,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-10-11 12:50:51,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-11 12:50:51,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-10-11 12:50:51,297 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-10-11 12:50:51,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:51,298 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-10-11 12:50:51,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:51,298 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-10-11 12:50:51,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:51,298 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:51,298 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:51,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-11 12:50:51,499 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:51,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:51,499 INFO L82 PathProgramCache]: Analyzing trace with hash 116503967, now seen corresponding path program 183 times [2020-10-11 12:50:51,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:51,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34371734] [2020-10-11 12:50:51,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:51,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34371734] [2020-10-11 12:50:51,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704615907] [2020-10-11 12:50:51,644 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:51,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:50:51,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:51,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 12:50:51,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:51,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:51,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-10-11 12:50:51,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121851317] [2020-10-11 12:50:51,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 12:50:51,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:51,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 12:50:51,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:50:51,876 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 16 states. [2020-10-11 12:50:52,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:52,835 INFO L93 Difference]: Finished difference Result 249 states and 587 transitions. [2020-10-11 12:50:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:50:52,837 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2020-10-11 12:50:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:52,838 INFO L225 Difference]: With dead ends: 249 [2020-10-11 12:50:52,838 INFO L226 Difference]: Without dead ends: 247 [2020-10-11 12:50:52,838 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=282, Invalid=710, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:50:52,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-11 12:50:52,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 171. [2020-10-11 12:50:52,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-11 12:50:52,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-11 12:50:52,842 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-11 12:50:52,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:52,842 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-11 12:50:52,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 12:50:52,842 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-11 12:50:52,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:52,842 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:52,842 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:53,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2020-10-11 12:50:53,043 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:53,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:53,044 INFO L82 PathProgramCache]: Analyzing trace with hash 116525326, now seen corresponding path program 184 times [2020-10-11 12:50:53,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:53,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176877883] [2020-10-11 12:50:53,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:53,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:53,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176877883] [2020-10-11 12:50:53,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871353821] [2020-10-11 12:50:53,173 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:53,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:50:53,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:53,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:53,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:53,422 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:50:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:53,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:53,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:53,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026874689] [2020-10-11 12:50:53,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:53,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:53,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:53,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:53,439 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-11 12:50:54,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:54,513 INFO L93 Difference]: Finished difference Result 248 states and 600 transitions. [2020-10-11 12:50:54,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:50:54,514 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:54,515 INFO L225 Difference]: With dead ends: 248 [2020-10-11 12:50:54,515 INFO L226 Difference]: Without dead ends: 243 [2020-10-11 12:50:54,515 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=451, Invalid=955, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 12:50:54,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-11 12:50:54,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 171. [2020-10-11 12:50:54,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-11 12:50:54,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-11 12:50:54,518 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-11 12:50:54,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:54,518 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-11 12:50:54,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:54,519 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-11 12:50:54,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:54,519 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:54,519 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:54,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:54,720 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:54,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:54,720 INFO L82 PathProgramCache]: Analyzing trace with hash 116526287, now seen corresponding path program 185 times [2020-10-11 12:50:54,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:54,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971575437] [2020-10-11 12:50:54,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:54,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971575437] [2020-10-11 12:50:54,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014981983] [2020-10-11 12:50:54,950 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:55,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:50:55,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:55,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:55,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:55,394 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:50:55,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:55,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:55,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:55,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324978281] [2020-10-11 12:50:55,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:55,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:55,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:55,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:55,493 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-11 12:50:57,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:57,034 INFO L93 Difference]: Finished difference Result 287 states and 694 transitions. [2020-10-11 12:50:57,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 12:50:57,036 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:57,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:57,037 INFO L225 Difference]: With dead ends: 287 [2020-10-11 12:50:57,037 INFO L226 Difference]: Without dead ends: 282 [2020-10-11 12:50:57,037 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=487, Invalid=1153, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 12:50:57,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-11 12:50:57,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 169. [2020-10-11 12:50:57,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-11 12:50:57,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-10-11 12:50:57,041 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-10-11 12:50:57,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:57,041 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-10-11 12:50:57,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:57,041 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-10-11 12:50:57,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:57,041 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:57,041 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:57,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:57,242 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:57,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:57,243 INFO L82 PathProgramCache]: Analyzing trace with hash 116533758, now seen corresponding path program 186 times [2020-10-11 12:50:57,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:57,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635849595] [2020-10-11 12:50:57,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:57,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635849595] [2020-10-11 12:50:57,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753780044] [2020-10-11 12:50:57,385 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:57,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:50:57,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:57,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:57,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:57,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:57,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:57,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108923069] [2020-10-11 12:50:57,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:57,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:57,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:57,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:57,689 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-10-11 12:50:58,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:58,858 INFO L93 Difference]: Finished difference Result 284 states and 678 transitions. [2020-10-11 12:50:58,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 12:50:58,860 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:58,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:58,861 INFO L225 Difference]: With dead ends: 284 [2020-10-11 12:50:58,861 INFO L226 Difference]: Without dead ends: 282 [2020-10-11 12:50:58,862 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2020-10-11 12:50:58,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-11 12:50:58,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 171. [2020-10-11 12:50:58,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-11 12:50:58,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-11 12:50:58,865 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-11 12:50:58,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:58,865 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-11 12:50:58,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:58,865 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-11 12:50:58,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:58,865 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:58,865 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:59,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:59,066 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:59,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:59,067 INFO L82 PathProgramCache]: Analyzing trace with hash 116555117, now seen corresponding path program 187 times [2020-10-11 12:50:59,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:59,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237418784] [2020-10-11 12:50:59,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:59,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237418784] [2020-10-11 12:50:59,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108824188] [2020-10-11 12:50:59,225 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:59,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:59,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:59,493 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:50:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:59,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:59,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:59,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383097394] [2020-10-11 12:50:59,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:59,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:59,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:59,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:59,552 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-11 12:51:00,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:00,907 INFO L93 Difference]: Finished difference Result 289 states and 702 transitions. [2020-10-11 12:51:00,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 12:51:00,908 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:00,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:00,909 INFO L225 Difference]: With dead ends: 289 [2020-10-11 12:51:00,909 INFO L226 Difference]: Without dead ends: 284 [2020-10-11 12:51:00,909 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 12:51:00,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-11 12:51:00,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 172. [2020-10-11 12:51:00,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-11 12:51:00,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 436 transitions. [2020-10-11 12:51:00,913 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 436 transitions. Word has length 14 [2020-10-11 12:51:00,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:00,913 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 436 transitions. [2020-10-11 12:51:00,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:00,913 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 436 transitions. [2020-10-11 12:51:00,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:00,913 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:00,913 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:01,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:01,114 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:01,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:01,115 INFO L82 PathProgramCache]: Analyzing trace with hash 116556078, now seen corresponding path program 188 times [2020-10-11 12:51:01,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:01,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148993665] [2020-10-11 12:51:01,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:01,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148993665] [2020-10-11 12:51:01,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538809759] [2020-10-11 12:51:01,284 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:01,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:51:01,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:01,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:01,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:01,550 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:51:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:01,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:01,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:01,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16280785] [2020-10-11 12:51:01,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:01,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:01,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:01,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:01,583 INFO L87 Difference]: Start difference. First operand 172 states and 436 transitions. Second operand 17 states. [2020-10-11 12:51:03,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:03,183 INFO L93 Difference]: Finished difference Result 312 states and 753 transitions. [2020-10-11 12:51:03,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 12:51:03,184 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:03,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:03,185 INFO L225 Difference]: With dead ends: 312 [2020-10-11 12:51:03,185 INFO L226 Difference]: Without dead ends: 304 [2020-10-11 12:51:03,185 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 12:51:03,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-11 12:51:03,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 165. [2020-10-11 12:51:03,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-11 12:51:03,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-10-11 12:51:03,189 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-10-11 12:51:03,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:03,189 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-10-11 12:51:03,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:03,189 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-10-11 12:51:03,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:03,189 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:03,189 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:03,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:03,390 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:03,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:03,391 INFO L82 PathProgramCache]: Analyzing trace with hash 116764398, now seen corresponding path program 189 times [2020-10-11 12:51:03,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:03,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257477629] [2020-10-11 12:51:03,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:03,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:03,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257477629] [2020-10-11 12:51:03,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167282322] [2020-10-11 12:51:03,546 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:03,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:51:03,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:03,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:03,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:03,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:03,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:03,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375761957] [2020-10-11 12:51:03,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:03,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:03,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:03,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:03,822 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-10-11 12:51:04,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:04,716 INFO L93 Difference]: Finished difference Result 262 states and 617 transitions. [2020-10-11 12:51:04,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:51:04,717 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:04,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:04,718 INFO L225 Difference]: With dead ends: 262 [2020-10-11 12:51:04,718 INFO L226 Difference]: Without dead ends: 260 [2020-10-11 12:51:04,718 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:51:04,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-11 12:51:04,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 167. [2020-10-11 12:51:04,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-11 12:51:04,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-11 12:51:04,722 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-11 12:51:04,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:04,722 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-11 12:51:04,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:04,722 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-11 12:51:04,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:04,723 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:04,723 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:04,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-11 12:51:04,930 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:04,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:04,930 INFO L82 PathProgramCache]: Analyzing trace with hash 117427488, now seen corresponding path program 190 times [2020-10-11 12:51:04,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:04,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821155983] [2020-10-11 12:51:04,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:05,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821155983] [2020-10-11 12:51:05,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586013628] [2020-10-11 12:51:05,067 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:05,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:51:05,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:05,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:05,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:05,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:05,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:05,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053468108] [2020-10-11 12:51:05,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:05,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:05,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:05,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:05,376 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-11 12:51:06,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:06,506 INFO L93 Difference]: Finished difference Result 271 states and 650 transitions. [2020-10-11 12:51:06,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:51:06,507 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:06,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:06,508 INFO L225 Difference]: With dead ends: 271 [2020-10-11 12:51:06,508 INFO L226 Difference]: Without dead ends: 269 [2020-10-11 12:51:06,508 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=396, Invalid=936, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 12:51:06,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-11 12:51:06,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-10-11 12:51:06,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-11 12:51:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-11 12:51:06,512 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-11 12:51:06,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:06,512 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-11 12:51:06,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:06,512 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-11 12:51:06,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:06,513 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:06,513 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:06,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-11 12:51:06,713 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:06,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:06,714 INFO L82 PathProgramCache]: Analyzing trace with hash 117448847, now seen corresponding path program 191 times [2020-10-11 12:51:06,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:06,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247212356] [2020-10-11 12:51:06,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:06,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247212356] [2020-10-11 12:51:06,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839721342] [2020-10-11 12:51:06,859 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:06,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:51:06,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:06,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:06,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:07,091 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:51:07,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:07,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:07,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:07,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814041401] [2020-10-11 12:51:07,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:07,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:07,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:07,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:07,108 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-11 12:51:08,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:08,457 INFO L93 Difference]: Finished difference Result 296 states and 714 transitions. [2020-10-11 12:51:08,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 12:51:08,459 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:08,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:08,465 INFO L225 Difference]: With dead ends: 296 [2020-10-11 12:51:08,465 INFO L226 Difference]: Without dead ends: 288 [2020-10-11 12:51:08,465 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 12:51:08,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-11 12:51:08,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 171. [2020-10-11 12:51:08,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-11 12:51:08,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-10-11 12:51:08,468 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-10-11 12:51:08,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:08,468 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-10-11 12:51:08,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:08,468 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-10-11 12:51:08,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:08,468 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:08,469 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:08,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-10-11 12:51:08,672 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:08,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:08,672 INFO L82 PathProgramCache]: Analyzing trace with hash 117449808, now seen corresponding path program 192 times [2020-10-11 12:51:08,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:08,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257568211] [2020-10-11 12:51:08,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:08,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257568211] [2020-10-11 12:51:08,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419373131] [2020-10-11 12:51:08,833 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:08,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:51:08,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:08,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:08,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:09,035 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:51:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:09,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:09,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:09,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181684013] [2020-10-11 12:51:09,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:09,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:09,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:09,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:09,051 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-10-11 12:51:10,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:10,400 INFO L93 Difference]: Finished difference Result 298 states and 732 transitions. [2020-10-11 12:51:10,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 12:51:10,401 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:10,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:10,402 INFO L225 Difference]: With dead ends: 298 [2020-10-11 12:51:10,402 INFO L226 Difference]: Without dead ends: 290 [2020-10-11 12:51:10,402 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 12:51:10,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-11 12:51:10,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 169. [2020-10-11 12:51:10,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-11 12:51:10,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 429 transitions. [2020-10-11 12:51:10,406 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 429 transitions. Word has length 14 [2020-10-11 12:51:10,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:10,406 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 429 transitions. [2020-10-11 12:51:10,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:10,406 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 429 transitions. [2020-10-11 12:51:10,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:10,407 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:10,407 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:10,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-11 12:51:10,608 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:10,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:10,608 INFO L82 PathProgramCache]: Analyzing trace with hash 117478638, now seen corresponding path program 193 times [2020-10-11 12:51:10,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:10,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416774183] [2020-10-11 12:51:10,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:10,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416774183] [2020-10-11 12:51:10,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853279553] [2020-10-11 12:51:10,732 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:10,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:10,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:10,989 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:51:11,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:11,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:11,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:11,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430636515] [2020-10-11 12:51:11,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:11,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:11,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:11,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:11,014 INFO L87 Difference]: Start difference. First operand 169 states and 429 transitions. Second operand 17 states. [2020-10-11 12:51:12,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:12,696 INFO L93 Difference]: Finished difference Result 291 states and 709 transitions. [2020-10-11 12:51:12,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 12:51:12,698 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:12,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:12,699 INFO L225 Difference]: With dead ends: 291 [2020-10-11 12:51:12,699 INFO L226 Difference]: Without dead ends: 283 [2020-10-11 12:51:12,699 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 12:51:12,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-11 12:51:12,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 167. [2020-10-11 12:51:12,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-11 12:51:12,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-11 12:51:12,707 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-11 12:51:12,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:12,707 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-11 12:51:12,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:12,707 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-11 12:51:12,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:12,708 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:12,708 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:12,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2020-10-11 12:51:12,909 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:12,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:12,909 INFO L82 PathProgramCache]: Analyzing trace with hash 144470028, now seen corresponding path program 194 times [2020-10-11 12:51:12,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:12,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964327970] [2020-10-11 12:51:12,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:13,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964327970] [2020-10-11 12:51:13,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340159701] [2020-10-11 12:51:13,070 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:13,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:51:13,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:13,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:13,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:13,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:13,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:13,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983521330] [2020-10-11 12:51:13,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:13,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:13,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:13,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:13,425 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-11 12:51:14,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:14,641 INFO L93 Difference]: Finished difference Result 265 states and 622 transitions. [2020-10-11 12:51:14,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:51:14,642 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:14,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:14,643 INFO L225 Difference]: With dead ends: 265 [2020-10-11 12:51:14,643 INFO L226 Difference]: Without dead ends: 263 [2020-10-11 12:51:14,643 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 12:51:14,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-11 12:51:14,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 167. [2020-10-11 12:51:14,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-11 12:51:14,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-11 12:51:14,648 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-11 12:51:14,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:14,648 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-11 12:51:14,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:14,648 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-11 12:51:14,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:14,648 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:14,648 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:14,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:14,849 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:14,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:14,850 INFO L82 PathProgramCache]: Analyzing trace with hash 145133118, now seen corresponding path program 195 times [2020-10-11 12:51:14,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:14,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766439214] [2020-10-11 12:51:14,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:15,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766439214] [2020-10-11 12:51:15,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773738484] [2020-10-11 12:51:15,003 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:15,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:51:15,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:15,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:51:15,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:15,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:15,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:15,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:15,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128382678] [2020-10-11 12:51:15,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:15,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:15,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:15,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:15,323 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-11 12:51:16,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:16,785 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2020-10-11 12:51:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 12:51:16,787 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:16,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:16,788 INFO L225 Difference]: With dead ends: 262 [2020-10-11 12:51:16,788 INFO L226 Difference]: Without dead ends: 260 [2020-10-11 12:51:16,788 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 12:51:16,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-11 12:51:16,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 169. [2020-10-11 12:51:16,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-11 12:51:16,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-11 12:51:16,791 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-11 12:51:16,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:16,792 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-11 12:51:16,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:16,792 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-11 12:51:16,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:16,792 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:16,792 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:16,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2020-10-11 12:51:16,993 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:16,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:16,993 INFO L82 PathProgramCache]: Analyzing trace with hash 145155438, now seen corresponding path program 196 times [2020-10-11 12:51:16,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:16,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228489823] [2020-10-11 12:51:16,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:17,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228489823] [2020-10-11 12:51:17,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619456646] [2020-10-11 12:51:17,143 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:17,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:51:17,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:17,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:17,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:17,425 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:51:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:17,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:17,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:17,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52261807] [2020-10-11 12:51:17,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:17,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:17,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:17,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:17,464 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-11 12:51:19,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:19,476 INFO L93 Difference]: Finished difference Result 285 states and 688 transitions. [2020-10-11 12:51:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 12:51:19,478 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:19,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:19,479 INFO L225 Difference]: With dead ends: 285 [2020-10-11 12:51:19,479 INFO L226 Difference]: Without dead ends: 280 [2020-10-11 12:51:19,479 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 12:51:19,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-11 12:51:19,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 167. [2020-10-11 12:51:19,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-11 12:51:19,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-11 12:51:19,483 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-11 12:51:19,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:19,483 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-11 12:51:19,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:19,483 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-11 12:51:19,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:19,483 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:19,483 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:19,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:19,684 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:19,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:19,685 INFO L82 PathProgramCache]: Analyzing trace with hash 145184268, now seen corresponding path program 197 times [2020-10-11 12:51:19,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:19,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433535002] [2020-10-11 12:51:19,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:19,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:19,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433535002] [2020-10-11 12:51:19,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741589639] [2020-10-11 12:51:19,861 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:19,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:51:19,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:19,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:19,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:24,358 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:51:28,485 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2020-10-11 12:51:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:28,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:28,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-11 12:51:28,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683817371] [2020-10-11 12:51:28,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 12:51:28,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:28,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 12:51:28,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=220, Unknown=3, NotChecked=0, Total=306 [2020-10-11 12:51:28,489 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 18 states. [2020-10-11 12:51:32,692 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-11 12:51:37,359 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-11 12:51:41,554 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2020-10-11 12:51:46,001 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2020-10-11 12:51:48,225 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-11 12:51:57,089 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-11 12:52:01,525 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-10-11 12:52:34,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:34,184 INFO L93 Difference]: Finished difference Result 302 states and 718 transitions. [2020-10-11 12:52:34,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 12:52:34,185 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-11 12:52:34,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:34,186 INFO L225 Difference]: With dead ends: 302 [2020-10-11 12:52:34,187 INFO L226 Difference]: Without dead ends: 297 [2020-10-11 12:52:34,187 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 45.6s TimeCoverageRelationStatistics Valid=565, Invalid=1408, Unknown=7, NotChecked=0, Total=1980 [2020-10-11 12:52:34,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-11 12:52:34,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 166. [2020-10-11 12:52:34,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-11 12:52:34,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 414 transitions. [2020-10-11 12:52:34,191 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 414 transitions. Word has length 14 [2020-10-11 12:52:34,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:34,191 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 414 transitions. [2020-10-11 12:52:34,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 12:52:34,191 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 414 transitions. [2020-10-11 12:52:34,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:34,191 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:34,191 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:34,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:34,392 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:34,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:34,393 INFO L82 PathProgramCache]: Analyzing trace with hash 146086430, now seen corresponding path program 198 times [2020-10-11 12:52:34,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:34,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509604419] [2020-10-11 12:52:34,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:34,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:34,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509604419] [2020-10-11 12:52:34,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321034578] [2020-10-11 12:52:34,547 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:34,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:52:34,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:34,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:34,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:34,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:34,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:34,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:34,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530839169] [2020-10-11 12:52:34,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:34,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:34,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:34,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:34,840 INFO L87 Difference]: Start difference. First operand 166 states and 414 transitions. Second operand 17 states. [2020-10-11 12:52:35,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:35,338 INFO L93 Difference]: Finished difference Result 219 states and 516 transitions. [2020-10-11 12:52:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:52:35,339 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:35,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:35,340 INFO L225 Difference]: With dead ends: 219 [2020-10-11 12:52:35,340 INFO L226 Difference]: Without dead ends: 217 [2020-10-11 12:52:35,340 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:52:35,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-11 12:52:35,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 167. [2020-10-11 12:52:35,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-11 12:52:35,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-11 12:52:35,343 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-11 12:52:35,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:35,344 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-11 12:52:35,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:35,344 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-11 12:52:35,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:35,344 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:35,344 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:35,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:35,545 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:35,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:35,545 INFO L82 PathProgramCache]: Analyzing trace with hash 146108750, now seen corresponding path program 199 times [2020-10-11 12:52:35,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:35,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245511183] [2020-10-11 12:52:35,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:35,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:35,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245511183] [2020-10-11 12:52:35,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885781832] [2020-10-11 12:52:35,689 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:35,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:35,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:35,971 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:52:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:35,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:35,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:35,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168009336] [2020-10-11 12:52:35,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:35,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:35,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:35,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:35,996 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-11 12:52:36,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:36,639 INFO L93 Difference]: Finished difference Result 229 states and 538 transitions. [2020-10-11 12:52:36,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:52:36,640 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:36,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:36,641 INFO L225 Difference]: With dead ends: 229 [2020-10-11 12:52:36,641 INFO L226 Difference]: Without dead ends: 224 [2020-10-11 12:52:36,641 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:52:36,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-11 12:52:36,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 158. [2020-10-11 12:52:36,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-11 12:52:36,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 386 transitions. [2020-10-11 12:52:36,645 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 386 transitions. Word has length 14 [2020-10-11 12:52:36,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:36,645 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 386 transitions. [2020-10-11 12:52:36,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:36,645 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 386 transitions. [2020-10-11 12:52:36,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:36,646 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:36,646 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:36,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-11 12:52:36,857 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:36,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:36,857 INFO L82 PathProgramCache]: Analyzing trace with hash 2034084541, now seen corresponding path program 200 times [2020-10-11 12:52:36,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:36,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790082849] [2020-10-11 12:52:36,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:37,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:37,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790082849] [2020-10-11 12:52:37,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14173109] [2020-10-11 12:52:37,005 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:37,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:52:37,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:37,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:37,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:37,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:37,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:37,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234949999] [2020-10-11 12:52:37,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:37,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:37,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:37,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:37,269 INFO L87 Difference]: Start difference. First operand 158 states and 386 transitions. Second operand 17 states. [2020-10-11 12:52:37,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:37,707 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-10-11 12:52:37,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:52:37,709 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:37,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:37,709 INFO L225 Difference]: With dead ends: 229 [2020-10-11 12:52:37,710 INFO L226 Difference]: Without dead ends: 227 [2020-10-11 12:52:37,710 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:52:37,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-11 12:52:37,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-10-11 12:52:37,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-11 12:52:37,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-10-11 12:52:37,712 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-10-11 12:52:37,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:37,712 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-10-11 12:52:37,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:37,713 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-10-11 12:52:37,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:37,713 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:37,713 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:37,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-11 12:52:37,914 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:37,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:37,914 INFO L82 PathProgramCache]: Analyzing trace with hash 2034085502, now seen corresponding path program 201 times [2020-10-11 12:52:37,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:37,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039446517] [2020-10-11 12:52:37,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:38,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039446517] [2020-10-11 12:52:38,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390647772] [2020-10-11 12:52:38,088 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:38,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:52:38,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:38,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:38,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:38,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:38,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:38,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:38,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162051228] [2020-10-11 12:52:38,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:38,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:38,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:38,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:38,448 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-10-11 12:52:39,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:39,076 INFO L93 Difference]: Finished difference Result 237 states and 545 transitions. [2020-10-11 12:52:39,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:52:39,078 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:39,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:39,079 INFO L225 Difference]: With dead ends: 237 [2020-10-11 12:52:39,079 INFO L226 Difference]: Without dead ends: 235 [2020-10-11 12:52:39,079 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:52:39,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-11 12:52:39,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 160. [2020-10-11 12:52:39,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-11 12:52:39,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 392 transitions. [2020-10-11 12:52:39,082 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 392 transitions. Word has length 14 [2020-10-11 12:52:39,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:39,087 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 392 transitions. [2020-10-11 12:52:39,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:39,087 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 392 transitions. [2020-10-11 12:52:39,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:39,087 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:39,088 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:39,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-11 12:52:39,291 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:39,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:39,292 INFO L82 PathProgramCache]: Analyzing trace with hash 2034114332, now seen corresponding path program 202 times [2020-10-11 12:52:39,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:39,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58032253] [2020-10-11 12:52:39,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:39,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58032253] [2020-10-11 12:52:39,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022428181] [2020-10-11 12:52:39,447 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:39,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:52:39,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:39,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:39,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:39,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:39,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:39,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312762544] [2020-10-11 12:52:39,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:39,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:39,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:39,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:39,876 INFO L87 Difference]: Start difference. First operand 160 states and 392 transitions. Second operand 17 states. [2020-10-11 12:52:40,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:40,789 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-10-11 12:52:40,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:52:40,791 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:40,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:40,792 INFO L225 Difference]: With dead ends: 246 [2020-10-11 12:52:40,792 INFO L226 Difference]: Without dead ends: 244 [2020-10-11 12:52:40,792 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:52:40,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-11 12:52:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 164. [2020-10-11 12:52:40,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:52:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 403 transitions. [2020-10-11 12:52:40,795 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 403 transitions. Word has length 14 [2020-10-11 12:52:40,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:40,795 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 403 transitions. [2020-10-11 12:52:40,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:40,795 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 403 transitions. [2020-10-11 12:52:40,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:40,796 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:40,796 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:40,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-11 12:52:40,997 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:40,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:40,997 INFO L82 PathProgramCache]: Analyzing trace with hash 2035009023, now seen corresponding path program 203 times [2020-10-11 12:52:40,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:40,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976024840] [2020-10-11 12:52:40,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:41,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976024840] [2020-10-11 12:52:41,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450990274] [2020-10-11 12:52:41,193 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:41,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:52:41,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:41,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:41,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:41,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:41,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:41,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:41,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633017757] [2020-10-11 12:52:41,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:41,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:41,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:41,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:41,542 INFO L87 Difference]: Start difference. First operand 164 states and 403 transitions. Second operand 17 states. [2020-10-11 12:52:42,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:42,175 INFO L93 Difference]: Finished difference Result 245 states and 560 transitions. [2020-10-11 12:52:42,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:52:42,178 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:42,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:42,179 INFO L225 Difference]: With dead ends: 245 [2020-10-11 12:52:42,179 INFO L226 Difference]: Without dead ends: 243 [2020-10-11 12:52:42,179 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:52:42,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-11 12:52:42,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 163. [2020-10-11 12:52:42,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:52:42,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 399 transitions. [2020-10-11 12:52:42,182 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 399 transitions. Word has length 14 [2020-10-11 12:52:42,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:42,182 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 399 transitions. [2020-10-11 12:52:42,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:42,182 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 399 transitions. [2020-10-11 12:52:42,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:42,182 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:42,183 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:42,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-10-11 12:52:42,383 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:42,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:42,384 INFO L82 PathProgramCache]: Analyzing trace with hash 2062713692, now seen corresponding path program 204 times [2020-10-11 12:52:42,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:42,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656258990] [2020-10-11 12:52:42,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:42,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:42,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656258990] [2020-10-11 12:52:42,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283339775] [2020-10-11 12:52:42,599 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:42,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:52:42,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:42,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:42,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:42,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:42,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:42,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979586889] [2020-10-11 12:52:42,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:42,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:42,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:42,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:42,962 INFO L87 Difference]: Start difference. First operand 163 states and 399 transitions. Second operand 17 states. [2020-10-11 12:52:43,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:43,551 INFO L93 Difference]: Finished difference Result 239 states and 549 transitions. [2020-10-11 12:52:43,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:52:43,552 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:43,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:43,553 INFO L225 Difference]: With dead ends: 239 [2020-10-11 12:52:43,553 INFO L226 Difference]: Without dead ends: 237 [2020-10-11 12:52:43,553 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:52:43,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-11 12:52:43,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 162. [2020-10-11 12:52:43,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-11 12:52:43,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 396 transitions. [2020-10-11 12:52:43,557 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 396 transitions. Word has length 14 [2020-10-11 12:52:43,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:43,557 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 396 transitions. [2020-10-11 12:52:43,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:43,557 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 396 transitions. [2020-10-11 12:52:43,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:43,557 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:43,557 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:43,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-10-11 12:52:43,758 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:43,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:43,759 INFO L82 PathProgramCache]: Analyzing trace with hash 2063667004, now seen corresponding path program 205 times [2020-10-11 12:52:43,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:43,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110529752] [2020-10-11 12:52:43,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:43,982 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:43,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110529752] [2020-10-11 12:52:43,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412360280] [2020-10-11 12:52:43,983 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:44,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:44,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:44,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:44,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:44,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399528644] [2020-10-11 12:52:44,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:44,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:44,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:44,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:44,306 INFO L87 Difference]: Start difference. First operand 162 states and 396 transitions. Second operand 17 states. [2020-10-11 12:52:44,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:44,762 INFO L93 Difference]: Finished difference Result 220 states and 508 transitions. [2020-10-11 12:52:44,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:52:44,763 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:44,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:44,764 INFO L225 Difference]: With dead ends: 220 [2020-10-11 12:52:44,764 INFO L226 Difference]: Without dead ends: 218 [2020-10-11 12:52:44,765 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:52:44,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-11 12:52:44,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 156. [2020-10-11 12:52:44,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-11 12:52:44,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2020-10-11 12:52:44,768 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 14 [2020-10-11 12:52:44,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:44,768 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2020-10-11 12:52:44,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:44,768 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2020-10-11 12:52:44,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:44,769 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:44,769 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:44,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-10-11 12:52:44,969 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:44,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:44,970 INFO L82 PathProgramCache]: Analyzing trace with hash 313362251, now seen corresponding path program 206 times [2020-10-11 12:52:44,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:44,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642811450] [2020-10-11 12:52:44,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:45,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642811450] [2020-10-11 12:52:45,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852040143] [2020-10-11 12:52:45,129 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:45,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:52:45,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:45,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:45,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:45,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:45,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:45,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136474452] [2020-10-11 12:52:45,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:45,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:45,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:45,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:45,485 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 17 states. [2020-10-11 12:52:46,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:46,025 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-10-11 12:52:46,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:52:46,026 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:46,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:46,027 INFO L225 Difference]: With dead ends: 229 [2020-10-11 12:52:46,027 INFO L226 Difference]: Without dead ends: 227 [2020-10-11 12:52:46,027 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:52:46,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-11 12:52:46,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-11 12:52:46,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-11 12:52:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 395 transitions. [2020-10-11 12:52:46,030 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 395 transitions. Word has length 14 [2020-10-11 12:52:46,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:46,031 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 395 transitions. [2020-10-11 12:52:46,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:46,031 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 395 transitions. [2020-10-11 12:52:46,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:46,031 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:46,031 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:46,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2020-10-11 12:52:46,232 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:46,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:46,232 INFO L82 PathProgramCache]: Analyzing trace with hash 313363212, now seen corresponding path program 207 times [2020-10-11 12:52:46,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:46,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653614818] [2020-10-11 12:52:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:46,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653614818] [2020-10-11 12:52:46,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532114920] [2020-10-11 12:52:46,388 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:46,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:52:46,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:46,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:46,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:46,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:46,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:46,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088139071] [2020-10-11 12:52:46,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:46,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:46,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:46,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:46,771 INFO L87 Difference]: Start difference. First operand 160 states and 395 transitions. Second operand 17 states. [2020-10-11 12:52:47,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:47,398 INFO L93 Difference]: Finished difference Result 233 states and 536 transitions. [2020-10-11 12:52:47,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:52:47,400 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:47,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:47,400 INFO L225 Difference]: With dead ends: 233 [2020-10-11 12:52:47,400 INFO L226 Difference]: Without dead ends: 231 [2020-10-11 12:52:47,401 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:52:47,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-11 12:52:47,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 159. [2020-10-11 12:52:47,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-11 12:52:47,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 392 transitions. [2020-10-11 12:52:47,404 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 392 transitions. Word has length 14 [2020-10-11 12:52:47,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:47,405 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 392 transitions. [2020-10-11 12:52:47,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:47,405 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 392 transitions. [2020-10-11 12:52:47,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:47,405 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:47,405 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:47,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:47,606 INFO L429 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:47,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:47,606 INFO L82 PathProgramCache]: Analyzing trace with hash 313392042, now seen corresponding path program 208 times [2020-10-11 12:52:47,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:47,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300349928] [2020-10-11 12:52:47,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:47,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300349928] [2020-10-11 12:52:47,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478121090] [2020-10-11 12:52:47,770 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:47,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:52:47,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:47,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:47,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:48,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:48,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:48,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746360818] [2020-10-11 12:52:48,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:48,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:48,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:48,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:48,263 INFO L87 Difference]: Start difference. First operand 159 states and 392 transitions. Second operand 17 states. [2020-10-11 12:52:49,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:49,320 INFO L93 Difference]: Finished difference Result 256 states and 582 transitions. [2020-10-11 12:52:49,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:52:49,322 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:49,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:49,322 INFO L225 Difference]: With dead ends: 256 [2020-10-11 12:52:49,323 INFO L226 Difference]: Without dead ends: 254 [2020-10-11 12:52:49,323 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:52:49,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-11 12:52:49,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 163. [2020-10-11 12:52:49,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:52:49,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 403 transitions. [2020-10-11 12:52:49,327 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 403 transitions. Word has length 14 [2020-10-11 12:52:49,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:49,327 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 403 transitions. [2020-10-11 12:52:49,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:49,327 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 403 transitions. [2020-10-11 12:52:49,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:49,327 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:49,327 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:49,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:49,528 INFO L429 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:49,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:49,529 INFO L82 PathProgramCache]: Analyzing trace with hash 314286733, now seen corresponding path program 209 times [2020-10-11 12:52:49,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:49,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110535229] [2020-10-11 12:52:49,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:49,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:49,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:49,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110535229] [2020-10-11 12:52:49,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967200167] [2020-10-11 12:52:49,688 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:49,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:52:49,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:49,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:49,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:50,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:50,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:50,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218693454] [2020-10-11 12:52:50,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:50,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:50,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:50,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:50,011 INFO L87 Difference]: Start difference. First operand 163 states and 403 transitions. Second operand 17 states. [2020-10-11 12:52:50,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:50,725 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-10-11 12:52:50,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:52:50,727 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:50,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:50,728 INFO L225 Difference]: With dead ends: 246 [2020-10-11 12:52:50,728 INFO L226 Difference]: Without dead ends: 244 [2020-10-11 12:52:50,728 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:52:50,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-11 12:52:50,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 162. [2020-10-11 12:52:50,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-11 12:52:50,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 399 transitions. [2020-10-11 12:52:50,732 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 399 transitions. Word has length 14 [2020-10-11 12:52:50,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:50,732 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 399 transitions. [2020-10-11 12:52:50,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:50,732 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 399 transitions. [2020-10-11 12:52:50,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:50,732 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:50,732 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:50,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:50,933 INFO L429 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:50,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:50,934 INFO L82 PathProgramCache]: Analyzing trace with hash 950591741, now seen corresponding path program 210 times [2020-10-11 12:52:50,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:50,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077632423] [2020-10-11 12:52:50,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:51,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077632423] [2020-10-11 12:52:51,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345475267] [2020-10-11 12:52:51,101 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:51,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 12:52:51,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:51,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:51,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:51,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:51,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:51,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416288917] [2020-10-11 12:52:51,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:51,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:51,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:51,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:51,441 INFO L87 Difference]: Start difference. First operand 162 states and 399 transitions. Second operand 17 states. [2020-10-11 12:52:52,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:52,175 INFO L93 Difference]: Finished difference Result 250 states and 575 transitions. [2020-10-11 12:52:52,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:52:52,176 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:52,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:52,177 INFO L225 Difference]: With dead ends: 250 [2020-10-11 12:52:52,177 INFO L226 Difference]: Without dead ends: 248 [2020-10-11 12:52:52,177 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:52:52,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-11 12:52:52,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 164. [2020-10-11 12:52:52,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:52:52,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-10-11 12:52:52,181 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-10-11 12:52:52,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:52,181 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-10-11 12:52:52,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:52,181 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-10-11 12:52:52,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:52,181 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:52,181 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:52,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-10-11 12:52:52,382 INFO L429 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:52,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:52,383 INFO L82 PathProgramCache]: Analyzing trace with hash 950592702, now seen corresponding path program 211 times [2020-10-11 12:52:52,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:52,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396363923] [2020-10-11 12:52:52,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:52,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396363923] [2020-10-11 12:52:52,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656646500] [2020-10-11 12:52:52,568 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:52,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:52,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:52,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:52,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:52,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:52,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318193712] [2020-10-11 12:52:52,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:52,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:52,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:52,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:52,950 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-10-11 12:52:53,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:53,704 INFO L93 Difference]: Finished difference Result 245 states and 564 transitions. [2020-10-11 12:52:53,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:52:53,706 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:53,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:53,707 INFO L225 Difference]: With dead ends: 245 [2020-10-11 12:52:53,707 INFO L226 Difference]: Without dead ends: 243 [2020-10-11 12:52:53,707 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:52:53,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-11 12:52:53,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 164. [2020-10-11 12:52:53,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:52:53,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-10-11 12:52:53,710 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-10-11 12:52:53,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:53,710 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-10-11 12:52:53,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:53,710 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-10-11 12:52:53,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:53,710 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:53,710 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:53,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:53,911 INFO L429 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:53,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:53,912 INFO L82 PathProgramCache]: Analyzing trace with hash 950621532, now seen corresponding path program 212 times [2020-10-11 12:52:53,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:53,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088211062] [2020-10-11 12:52:53,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:54,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088211062] [2020-10-11 12:52:54,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892998013] [2020-10-11 12:52:54,074 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:54,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:52:54,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:54,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:54,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:54,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:54,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:54,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:54,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586421580] [2020-10-11 12:52:54,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:54,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:54,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:54,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:54,537 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-10-11 12:52:55,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:55,713 INFO L93 Difference]: Finished difference Result 262 states and 602 transitions. [2020-10-11 12:52:55,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:52:55,715 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:55,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:55,715 INFO L225 Difference]: With dead ends: 262 [2020-10-11 12:52:55,716 INFO L226 Difference]: Without dead ends: 260 [2020-10-11 12:52:55,716 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:52:55,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-11 12:52:55,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 165. [2020-10-11 12:52:55,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-11 12:52:55,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-10-11 12:52:55,719 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-10-11 12:52:55,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:55,719 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-10-11 12:52:55,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:55,719 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-10-11 12:52:55,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:55,720 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:55,720 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:55,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-10-11 12:52:55,921 INFO L429 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:55,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:55,921 INFO L82 PathProgramCache]: Analyzing trace with hash 971147531, now seen corresponding path program 213 times [2020-10-11 12:52:55,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:55,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368016407] [2020-10-11 12:52:55,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:55,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:56,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368016407] [2020-10-11 12:52:56,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123991124] [2020-10-11 12:52:56,117 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:56,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 12:52:56,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:56,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:56,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:56,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:56,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:56,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37378142] [2020-10-11 12:52:56,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:56,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:56,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:56,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:56,542 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-10-11 12:52:57,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:57,534 INFO L93 Difference]: Finished difference Result 254 states and 594 transitions. [2020-10-11 12:52:57,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 12:52:57,536 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:57,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:57,537 INFO L225 Difference]: With dead ends: 254 [2020-10-11 12:52:57,537 INFO L226 Difference]: Without dead ends: 252 [2020-10-11 12:52:57,537 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 12:52:57,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-11 12:52:57,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 166. [2020-10-11 12:52:57,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-11 12:52:57,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 416 transitions. [2020-10-11 12:52:57,541 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 416 transitions. Word has length 14 [2020-10-11 12:52:57,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:57,541 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 416 transitions. [2020-10-11 12:52:57,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:57,541 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 416 transitions. [2020-10-11 12:52:57,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:57,541 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:57,541 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:57,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-10-11 12:52:57,742 INFO L429 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:57,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:57,743 INFO L82 PathProgramCache]: Analyzing trace with hash 971148492, now seen corresponding path program 214 times [2020-10-11 12:52:57,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:57,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836386173] [2020-10-11 12:52:57,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:57,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836386173] [2020-10-11 12:52:57,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289112734] [2020-10-11 12:52:57,906 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:57,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:52:57,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:57,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:57,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:58,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:58,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:58,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:58,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960603798] [2020-10-11 12:52:58,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:58,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:58,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:58,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:58,229 INFO L87 Difference]: Start difference. First operand 166 states and 416 transitions. Second operand 17 states. [2020-10-11 12:52:59,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:59,131 INFO L93 Difference]: Finished difference Result 248 states and 576 transitions. [2020-10-11 12:52:59,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:52:59,133 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:59,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:59,134 INFO L225 Difference]: With dead ends: 248 [2020-10-11 12:52:59,134 INFO L226 Difference]: Without dead ends: 246 [2020-10-11 12:52:59,135 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:52:59,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-11 12:52:59,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 167. [2020-10-11 12:52:59,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-11 12:52:59,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-11 12:52:59,138 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-11 12:52:59,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:59,138 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-11 12:52:59,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:59,139 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-11 12:52:59,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:59,139 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:59,139 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:59,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:59,340 INFO L429 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:59,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:59,340 INFO L82 PathProgramCache]: Analyzing trace with hash 971810621, now seen corresponding path program 215 times [2020-10-11 12:52:59,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:59,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847653622] [2020-10-11 12:52:59,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:59,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:59,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847653622] [2020-10-11 12:52:59,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147346024] [2020-10-11 12:52:59,511 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:59,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 12:52:59,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:59,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:59,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:59,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:59,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:59,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:59,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103494573] [2020-10-11 12:52:59,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:59,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:59,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:59,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:59,840 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-11 12:53:00,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:00,850 INFO L93 Difference]: Finished difference Result 245 states and 579 transitions. [2020-10-11 12:53:00,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:53:00,853 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:00,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:00,853 INFO L225 Difference]: With dead ends: 245 [2020-10-11 12:53:00,853 INFO L226 Difference]: Without dead ends: 243 [2020-10-11 12:53:00,854 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=324, Invalid=798, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:53:00,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-11 12:53:00,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 169. [2020-10-11 12:53:00,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-11 12:53:00,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-11 12:53:00,859 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-11 12:53:00,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:00,859 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-11 12:53:00,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:00,859 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-11 12:53:00,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:00,868 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:00,868 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:01,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:01,080 INFO L429 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:01,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:01,080 INFO L82 PathProgramCache]: Analyzing trace with hash 971831980, now seen corresponding path program 216 times [2020-10-11 12:53:01,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:01,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659549328] [2020-10-11 12:53:01,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:01,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659549328] [2020-10-11 12:53:01,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124148846] [2020-10-11 12:53:01,252 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:01,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:53:01,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:01,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:01,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:01,523 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:53:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:01,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:01,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:01,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471065615] [2020-10-11 12:53:01,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:01,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:01,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:01,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:53:01,547 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-11 12:53:02,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:02,221 INFO L93 Difference]: Finished difference Result 223 states and 540 transitions. [2020-10-11 12:53:02,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:53:02,224 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:02,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:02,225 INFO L225 Difference]: With dead ends: 223 [2020-10-11 12:53:02,225 INFO L226 Difference]: Without dead ends: 218 [2020-10-11 12:53:02,225 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:53:02,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-11 12:53:02,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 169. [2020-10-11 12:53:02,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-11 12:53:02,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-11 12:53:02,227 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-11 12:53:02,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:02,227 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-11 12:53:02,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:02,228 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-11 12:53:02,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:02,228 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:02,228 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:02,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2020-10-11 12:53:02,431 INFO L429 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:02,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:02,432 INFO L82 PathProgramCache]: Analyzing trace with hash 971832941, now seen corresponding path program 217 times [2020-10-11 12:53:02,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:02,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653804125] [2020-10-11 12:53:02,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:02,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653804125] [2020-10-11 12:53:02,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182255772] [2020-10-11 12:53:02,608 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:02,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:02,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:02,927 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:53:03,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:03,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:03,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:03,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349175838] [2020-10-11 12:53:03,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:03,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:03,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:03,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:53:03,012 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-11 12:53:04,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:04,402 INFO L93 Difference]: Finished difference Result 286 states and 679 transitions. [2020-10-11 12:53:04,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:53:04,403 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:04,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:04,404 INFO L225 Difference]: With dead ends: 286 [2020-10-11 12:53:04,404 INFO L226 Difference]: Without dead ends: 281 [2020-10-11 12:53:04,404 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 12:53:04,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-11 12:53:04,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 167. [2020-10-11 12:53:04,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-11 12:53:04,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-11 12:53:04,408 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-11 12:53:04,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:04,408 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-11 12:53:04,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:04,408 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-11 12:53:04,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:04,409 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:04,409 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:04,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:04,610 INFO L429 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:04,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:04,610 INFO L82 PathProgramCache]: Analyzing trace with hash 971840412, now seen corresponding path program 218 times [2020-10-11 12:53:04,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:04,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681489182] [2020-10-11 12:53:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:04,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681489182] [2020-10-11 12:53:04,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508913226] [2020-10-11 12:53:04,780 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:04,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:53:04,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:04,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:04,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:05,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:05,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:05,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713368454] [2020-10-11 12:53:05,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:05,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:05,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:05,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:53:05,182 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-11 12:53:06,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:06,247 INFO L93 Difference]: Finished difference Result 268 states and 630 transitions. [2020-10-11 12:53:06,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 12:53:06,249 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:06,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:06,250 INFO L225 Difference]: With dead ends: 268 [2020-10-11 12:53:06,250 INFO L226 Difference]: Without dead ends: 266 [2020-10-11 12:53:06,251 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2020-10-11 12:53:06,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-11 12:53:06,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 169. [2020-10-11 12:53:06,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-11 12:53:06,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-11 12:53:06,254 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-11 12:53:06,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:06,254 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-11 12:53:06,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:06,255 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-11 12:53:06,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:06,255 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:06,255 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:06,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable251 [2020-10-11 12:53:06,456 INFO L429 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:06,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:06,457 INFO L82 PathProgramCache]: Analyzing trace with hash 971861771, now seen corresponding path program 219 times [2020-10-11 12:53:06,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:06,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74231164] [2020-10-11 12:53:06,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:06,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74231164] [2020-10-11 12:53:06,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29907813] [2020-10-11 12:53:06,625 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:06,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:53:06,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:06,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:06,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:06,936 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:53:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:07,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:07,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:07,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816065206] [2020-10-11 12:53:07,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:07,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:07,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:07,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:53:07,004 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-11 12:53:08,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:08,596 INFO L93 Difference]: Finished difference Result 296 states and 707 transitions. [2020-10-11 12:53:08,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:53:08,597 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:08,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:08,598 INFO L225 Difference]: With dead ends: 296 [2020-10-11 12:53:08,598 INFO L226 Difference]: Without dead ends: 291 [2020-10-11 12:53:08,599 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=419, Invalid=987, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 12:53:08,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-11 12:53:08,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 169. [2020-10-11 12:53:08,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-11 12:53:08,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-11 12:53:08,602 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-11 12:53:08,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:08,602 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-11 12:53:08,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:08,602 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-11 12:53:08,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:08,603 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:08,603 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:08,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:08,804 INFO L429 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:08,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:08,804 INFO L82 PathProgramCache]: Analyzing trace with hash 971862732, now seen corresponding path program 220 times [2020-10-11 12:53:08,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:08,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110328517] [2020-10-11 12:53:08,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:08,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:09,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110328517] [2020-10-11 12:53:09,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405368026] [2020-10-11 12:53:09,006 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:09,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:53:09,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:09,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:09,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:09,386 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:53:09,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:09,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:09,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:09,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489933110] [2020-10-11 12:53:09,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:09,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:09,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:09,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:53:09,425 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-11 12:53:11,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:11,141 INFO L93 Difference]: Finished difference Result 299 states and 710 transitions. [2020-10-11 12:53:11,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:53:11,143 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:11,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:11,144 INFO L225 Difference]: With dead ends: 299 [2020-10-11 12:53:11,144 INFO L226 Difference]: Without dead ends: 294 [2020-10-11 12:53:11,144 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=476, Invalid=1084, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 12:53:11,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-11 12:53:11,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 165. [2020-10-11 12:53:11,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-11 12:53:11,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-10-11 12:53:11,148 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-10-11 12:53:11,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:11,148 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-10-11 12:53:11,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:11,148 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-10-11 12:53:11,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:11,148 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:11,149 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:11,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:11,349 INFO L429 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:11,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:11,350 INFO L82 PathProgramCache]: Analyzing trace with hash 972071052, now seen corresponding path program 221 times [2020-10-11 12:53:11,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:11,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161582790] [2020-10-11 12:53:11,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:11,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161582790] [2020-10-11 12:53:11,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021162931] [2020-10-11 12:53:11,504 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:11,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:53:11,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:11,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:11,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:11,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:11,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:11,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056673573] [2020-10-11 12:53:11,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:11,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:11,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:11,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:53:11,975 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-10-11 12:53:13,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:13,801 INFO L93 Difference]: Finished difference Result 274 states and 633 transitions. [2020-10-11 12:53:13,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:53:13,802 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:13,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:13,803 INFO L225 Difference]: With dead ends: 274 [2020-10-11 12:53:13,804 INFO L226 Difference]: Without dead ends: 272 [2020-10-11 12:53:13,804 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 12:53:13,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-11 12:53:13,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 169. [2020-10-11 12:53:13,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-11 12:53:13,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-11 12:53:13,811 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-11 12:53:13,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:13,811 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-11 12:53:13,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:13,817 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-11 12:53:13,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:13,817 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:13,817 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:14,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:14,018 INFO L429 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:14,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:14,018 INFO L82 PathProgramCache]: Analyzing trace with hash 972734142, now seen corresponding path program 222 times [2020-10-11 12:53:14,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:14,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157291874] [2020-10-11 12:53:14,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:14,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:14,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157291874] [2020-10-11 12:53:14,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32229441] [2020-10-11 12:53:14,185 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:14,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:53:14,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:14,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:14,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:14,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:14,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:14,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:14,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399105553] [2020-10-11 12:53:14,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:14,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:14,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:14,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:53:14,605 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-11 12:53:16,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:16,394 INFO L93 Difference]: Finished difference Result 282 states and 670 transitions. [2020-10-11 12:53:16,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:53:16,398 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:16,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:16,399 INFO L225 Difference]: With dead ends: 282 [2020-10-11 12:53:16,399 INFO L226 Difference]: Without dead ends: 280 [2020-10-11 12:53:16,400 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 12:53:16,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-11 12:53:16,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 174. [2020-10-11 12:53:16,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-11 12:53:16,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 442 transitions. [2020-10-11 12:53:16,404 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 442 transitions. Word has length 14 [2020-10-11 12:53:16,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:16,404 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 442 transitions. [2020-10-11 12:53:16,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:16,405 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 442 transitions. [2020-10-11 12:53:16,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:16,405 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:16,405 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:16,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-10-11 12:53:16,608 INFO L429 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:16,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:16,609 INFO L82 PathProgramCache]: Analyzing trace with hash 972755501, now seen corresponding path program 223 times [2020-10-11 12:53:16,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:16,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735513523] [2020-10-11 12:53:16,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:16,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:16,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735513523] [2020-10-11 12:53:16,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196046392] [2020-10-11 12:53:16,819 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:16,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:16,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:17,146 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:53:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:17,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:17,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:17,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107289333] [2020-10-11 12:53:17,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:17,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:17,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:17,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:53:17,225 INFO L87 Difference]: Start difference. First operand 174 states and 442 transitions. Second operand 17 states. [2020-10-11 12:53:19,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:19,147 INFO L93 Difference]: Finished difference Result 321 states and 773 transitions. [2020-10-11 12:53:19,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 12:53:19,150 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:19,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:19,151 INFO L225 Difference]: With dead ends: 321 [2020-10-11 12:53:19,152 INFO L226 Difference]: Without dead ends: 313 [2020-10-11 12:53:19,152 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=528, Invalid=1278, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 12:53:19,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-11 12:53:19,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 176. [2020-10-11 12:53:19,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-11 12:53:19,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 452 transitions. [2020-10-11 12:53:19,156 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 452 transitions. Word has length 14 [2020-10-11 12:53:19,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:19,156 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 452 transitions. [2020-10-11 12:53:19,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:19,156 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 452 transitions. [2020-10-11 12:53:19,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:19,157 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:19,157 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:19,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-10-11 12:53:19,358 INFO L429 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:19,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:19,358 INFO L82 PathProgramCache]: Analyzing trace with hash 972756462, now seen corresponding path program 224 times [2020-10-11 12:53:19,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:19,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265441948] [2020-10-11 12:53:19,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:19,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265441948] [2020-10-11 12:53:19,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157782146] [2020-10-11 12:53:19,587 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:19,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:53:19,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:19,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:19,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:24,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:53:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:24,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:24,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:24,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949183127] [2020-10-11 12:53:24,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:24,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:24,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:24,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=190, Unknown=2, NotChecked=0, Total=272 [2020-10-11 12:53:24,186 INFO L87 Difference]: Start difference. First operand 176 states and 452 transitions. Second operand 17 states. [2020-10-11 12:53:28,980 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-11 12:53:33,156 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-11 12:53:37,488 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-11 12:53:41,842 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-10-11 12:53:43,961 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-11 12:53:48,713 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-11 12:53:50,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:50,016 INFO L93 Difference]: Finished difference Result 323 states and 782 transitions. [2020-10-11 12:53:50,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 12:53:50,019 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:50,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:50,020 INFO L225 Difference]: With dead ends: 323 [2020-10-11 12:53:50,021 INFO L226 Difference]: Without dead ends: 315 [2020-10-11 12:53:50,021 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=530, Invalid=1274, Unknown=2, NotChecked=0, Total=1806 [2020-10-11 12:53:50,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-11 12:53:50,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 171. [2020-10-11 12:53:50,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-11 12:53:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-10-11 12:53:50,026 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-10-11 12:53:50,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:50,026 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-10-11 12:53:50,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:50,026 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-10-11 12:53:50,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:50,027 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:50,027 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:50,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-10-11 12:53:50,236 INFO L429 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:50,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:50,236 INFO L82 PathProgramCache]: Analyzing trace with hash 972785292, now seen corresponding path program 225 times [2020-10-11 12:53:50,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:50,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960083627] [2020-10-11 12:53:50,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:50,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:50,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960083627] [2020-10-11 12:53:50,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930725590] [2020-10-11 12:53:50,476 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:50,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:53:50,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:50,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:50,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:50,908 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:53:50,910 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:53:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:50,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:50,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:50,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43725057] [2020-10-11 12:53:50,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:50,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:50,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:50,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:53:50,983 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-10-11 12:53:53,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:53,797 INFO L93 Difference]: Finished difference Result 320 states and 767 transitions. [2020-10-11 12:53:53,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 12:53:53,799 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:53,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:53,800 INFO L225 Difference]: With dead ends: 320 [2020-10-11 12:53:53,800 INFO L226 Difference]: Without dead ends: 312 [2020-10-11 12:53:53,800 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 12:53:53,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-11 12:53:53,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 170. [2020-10-11 12:53:53,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-11 12:53:53,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 431 transitions. [2020-10-11 12:53:53,804 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 431 transitions. Word has length 14 [2020-10-11 12:53:53,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:53,804 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 431 transitions. [2020-10-11 12:53:53,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:53,804 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 431 transitions. [2020-10-11 12:53:53,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:53,805 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:53,805 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:54,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-10-11 12:53:54,005 INFO L429 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:54,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:54,006 INFO L82 PathProgramCache]: Analyzing trace with hash 979221853, now seen corresponding path program 226 times [2020-10-11 12:53:54,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:54,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522237061] [2020-10-11 12:53:54,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:54,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:54,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522237061] [2020-10-11 12:53:54,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286250017] [2020-10-11 12:53:54,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:54,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:53:54,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:54,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:54,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:54,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:54,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:54,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446243275] [2020-10-11 12:53:54,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:54,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:54,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:54,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:53:54,546 INFO L87 Difference]: Start difference. First operand 170 states and 431 transitions. Second operand 17 states. [2020-10-11 12:53:55,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:55,522 INFO L93 Difference]: Finished difference Result 256 states and 599 transitions. [2020-10-11 12:53:55,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 12:53:55,525 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:55,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:55,525 INFO L225 Difference]: With dead ends: 256 [2020-10-11 12:53:55,526 INFO L226 Difference]: Without dead ends: 254 [2020-10-11 12:53:55,526 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:53:55,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-11 12:53:55,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 168. [2020-10-11 12:53:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-11 12:53:55,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 425 transitions. [2020-10-11 12:53:55,529 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 425 transitions. Word has length 14 [2020-10-11 12:53:55,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:55,529 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 425 transitions. [2020-10-11 12:53:55,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:55,529 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 425 transitions. [2020-10-11 12:53:55,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:55,530 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:55,530 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:55,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2020-10-11 12:53:55,730 INFO L429 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:55,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:55,731 INFO L82 PathProgramCache]: Analyzing trace with hash 999776682, now seen corresponding path program 227 times [2020-10-11 12:53:55,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:55,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916602806] [2020-10-11 12:53:55,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:55,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916602806] [2020-10-11 12:53:55,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282638176] [2020-10-11 12:53:55,911 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:55,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:53:55,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:55,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:55,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:56,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:56,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:56,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:56,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737692396] [2020-10-11 12:53:56,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:56,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:56,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:56,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:53:56,270 INFO L87 Difference]: Start difference. First operand 168 states and 425 transitions. Second operand 17 states. [2020-10-11 12:53:57,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:57,782 INFO L93 Difference]: Finished difference Result 294 states and 688 transitions. [2020-10-11 12:53:57,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 12:53:57,785 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:57,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:57,791 INFO L225 Difference]: With dead ends: 294 [2020-10-11 12:53:57,791 INFO L226 Difference]: Without dead ends: 292 [2020-10-11 12:53:57,791 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=389, Invalid=943, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 12:53:57,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-11 12:53:57,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 166. [2020-10-11 12:53:57,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-11 12:53:57,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 423 transitions. [2020-10-11 12:53:57,794 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 423 transitions. Word has length 14 [2020-10-11 12:53:57,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:57,794 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 423 transitions. [2020-10-11 12:53:57,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:57,794 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 423 transitions. [2020-10-11 12:53:57,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:57,794 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:57,794 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:57,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:57,995 INFO L429 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:57,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:57,996 INFO L82 PathProgramCache]: Analyzing trace with hash 999777643, now seen corresponding path program 228 times [2020-10-11 12:53:57,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:57,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787585383] [2020-10-11 12:53:57,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:58,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787585383] [2020-10-11 12:53:58,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348279202] [2020-10-11 12:53:58,174 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:58,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:53:58,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:58,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:58,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:58,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:58,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:58,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:58,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999163638] [2020-10-11 12:53:58,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:58,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:58,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:58,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:53:58,562 INFO L87 Difference]: Start difference. First operand 166 states and 423 transitions. Second operand 17 states. [2020-10-11 12:53:59,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:59,834 INFO L93 Difference]: Finished difference Result 266 states and 625 transitions. [2020-10-11 12:53:59,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:53:59,837 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:59,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:59,838 INFO L225 Difference]: With dead ends: 266 [2020-10-11 12:53:59,838 INFO L226 Difference]: Without dead ends: 264 [2020-10-11 12:53:59,838 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=316, Invalid=806, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:53:59,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-11 12:53:59,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 164. [2020-10-11 12:53:59,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:53:59,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-10-11 12:53:59,841 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-10-11 12:53:59,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:59,842 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-10-11 12:53:59,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:59,842 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-10-11 12:53:59,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:59,842 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:59,842 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:00,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:00,043 INFO L429 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:00,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:00,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1000439772, now seen corresponding path program 229 times [2020-10-11 12:54:00,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:00,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745972008] [2020-10-11 12:54:00,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:00,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745972008] [2020-10-11 12:54:00,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335550430] [2020-10-11 12:54:00,233 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:00,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:54:00,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:00,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:00,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:54:00,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558125516] [2020-10-11 12:54:00,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:54:00,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:00,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:54:00,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:54:00,596 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-10-11 12:54:02,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:02,126 INFO L93 Difference]: Finished difference Result 275 states and 656 transitions. [2020-10-11 12:54:02,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 12:54:02,128 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:54:02,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:02,128 INFO L225 Difference]: With dead ends: 275 [2020-10-11 12:54:02,129 INFO L226 Difference]: Without dead ends: 273 [2020-10-11 12:54:02,129 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 12:54:02,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-11 12:54:02,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 166. [2020-10-11 12:54:02,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-11 12:54:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-10-11 12:54:02,133 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-10-11 12:54:02,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:02,133 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-10-11 12:54:02,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:54:02,133 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-10-11 12:54:02,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:02,133 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:02,134 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:02,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:02,334 INFO L429 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:02,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:02,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1000461131, now seen corresponding path program 230 times [2020-10-11 12:54:02,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:02,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258032035] [2020-10-11 12:54:02,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:02,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:02,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258032035] [2020-10-11 12:54:02,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7379617] [2020-10-11 12:54:02,532 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:02,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:54:02,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:02,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:54:02,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:02,846 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:54:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:02,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:02,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:54:02,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141046433] [2020-10-11 12:54:02,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:54:02,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:02,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:54:02,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:54:02,872 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-10-11 12:54:04,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:04,332 INFO L93 Difference]: Finished difference Result 285 states and 690 transitions. [2020-10-11 12:54:04,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 12:54:04,334 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:54:04,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:04,335 INFO L225 Difference]: With dead ends: 285 [2020-10-11 12:54:04,335 INFO L226 Difference]: Without dead ends: 277 [2020-10-11 12:54:04,335 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=482, Invalid=1240, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 12:54:04,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-11 12:54:04,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 166. [2020-10-11 12:54:04,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-11 12:54:04,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-10-11 12:54:04,338 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-10-11 12:54:04,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:04,339 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-10-11 12:54:04,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:54:04,339 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-10-11 12:54:04,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:04,339 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:04,339 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:04,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable263 [2020-10-11 12:54:04,542 INFO L429 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:04,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:04,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1000462092, now seen corresponding path program 231 times [2020-10-11 12:54:04,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:04,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070143219] [2020-10-11 12:54:04,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:04,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:04,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070143219] [2020-10-11 12:54:04,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90562590] [2020-10-11 12:54:04,739 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:04,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:54:04,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:04,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:54:04,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:05,048 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:54:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:05,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:05,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:54:05,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432187661] [2020-10-11 12:54:05,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:54:05,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:05,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:54:05,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:54:05,123 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-10-11 12:54:07,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:07,184 INFO L93 Difference]: Finished difference Result 307 states and 744 transitions. [2020-10-11 12:54:07,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 12:54:07,187 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:54:07,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:07,188 INFO L225 Difference]: With dead ends: 307 [2020-10-11 12:54:07,188 INFO L226 Difference]: Without dead ends: 299 [2020-10-11 12:54:07,189 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 12:54:07,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-11 12:54:07,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 164. [2020-10-11 12:54:07,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:54:07,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-10-11 12:54:07,193 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-10-11 12:54:07,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:07,193 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-10-11 12:54:07,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:54:07,193 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-10-11 12:54:07,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:07,194 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:07,194 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:07,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:07,396 INFO L429 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:07,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:07,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1000469563, now seen corresponding path program 232 times [2020-10-11 12:54:07,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:07,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654556006] [2020-10-11 12:54:07,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:07,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654556006] [2020-10-11 12:54:07,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578352976] [2020-10-11 12:54:07,608 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:07,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:54:07,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:07,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:54:07,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:08,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:08,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:08,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:54:08,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219854456] [2020-10-11 12:54:08,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:54:08,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:08,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:54:08,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:54:08,017 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-10-11 12:54:09,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:09,663 INFO L93 Difference]: Finished difference Result 280 states and 668 transitions. [2020-10-11 12:54:09,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 12:54:09,665 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:54:09,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:09,666 INFO L225 Difference]: With dead ends: 280 [2020-10-11 12:54:09,666 INFO L226 Difference]: Without dead ends: 278 [2020-10-11 12:54:09,666 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=412, Invalid=994, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 12:54:09,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-11 12:54:09,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 166. [2020-10-11 12:54:09,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-11 12:54:09,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-10-11 12:54:09,670 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-10-11 12:54:09,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:09,670 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-10-11 12:54:09,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:54:09,670 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-10-11 12:54:09,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:09,671 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:09,671 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:09,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2020-10-11 12:54:09,872 INFO L429 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:09,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:09,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1000490922, now seen corresponding path program 233 times [2020-10-11 12:54:09,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:09,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731392412] [2020-10-11 12:54:09,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:10,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731392412] [2020-10-11 12:54:10,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536692223] [2020-10-11 12:54:10,130 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:10,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:54:10,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:10,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:54:10,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:10,526 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:54:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:10,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:10,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:54:10,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356142192] [2020-10-11 12:54:10,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:54:10,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:10,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:54:10,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:54:10,559 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-10-11 12:54:12,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:12,488 INFO L93 Difference]: Finished difference Result 315 states and 764 transitions. [2020-10-11 12:54:12,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 12:54:12,491 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:54:12,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:12,492 INFO L225 Difference]: With dead ends: 315 [2020-10-11 12:54:12,492 INFO L226 Difference]: Without dead ends: 307 [2020-10-11 12:54:12,492 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 12:54:12,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-11 12:54:12,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 164. [2020-10-11 12:54:12,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:54:12,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 414 transitions. [2020-10-11 12:54:12,495 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 414 transitions. Word has length 14 [2020-10-11 12:54:12,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:12,496 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 414 transitions. [2020-10-11 12:54:12,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:54:12,496 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 414 transitions. [2020-10-11 12:54:12,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:12,496 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:12,496 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:12,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:12,697 INFO L429 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:12,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:12,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1000491883, now seen corresponding path program 234 times [2020-10-11 12:54:12,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:12,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168121564] [2020-10-11 12:54:12,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:12,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:12,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168121564] [2020-10-11 12:54:12,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122373670] [2020-10-11 12:54:12,911 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:12,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:54:12,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:12,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:54:12,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:13,260 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:54:13,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:13,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:13,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:54:13,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899873589] [2020-10-11 12:54:13,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:54:13,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:13,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:54:13,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:54:13,292 INFO L87 Difference]: Start difference. First operand 164 states and 414 transitions. Second operand 17 states. [2020-10-11 12:54:15,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:15,526 INFO L93 Difference]: Finished difference Result 312 states and 754 transitions. [2020-10-11 12:54:15,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 12:54:15,530 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:54:15,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:15,531 INFO L225 Difference]: With dead ends: 312 [2020-10-11 12:54:15,531 INFO L226 Difference]: Without dead ends: 304 [2020-10-11 12:54:15,531 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 12:54:15,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-11 12:54:15,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 157. [2020-10-11 12:54:15,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-11 12:54:15,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 391 transitions. [2020-10-11 12:54:15,534 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 391 transitions. Word has length 14 [2020-10-11 12:54:15,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:15,534 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 391 transitions. [2020-10-11 12:54:15,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:54:15,535 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 391 transitions. [2020-10-11 12:54:15,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:15,535 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:15,535 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:15,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-10-11 12:54:15,736 INFO L429 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:15,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:15,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1001384652, now seen corresponding path program 235 times [2020-10-11 12:54:15,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:15,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204932763] [2020-10-11 12:54:15,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:15,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204932763] [2020-10-11 12:54:15,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589211548] [2020-10-11 12:54:15,994 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:16,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:54:16,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:16,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:54:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:16,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:16,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:54:16,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787276201] [2020-10-11 12:54:16,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:54:16,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:16,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:54:16,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:54:16,402 INFO L87 Difference]: Start difference. First operand 157 states and 391 transitions. Second operand 17 states. [2020-10-11 12:54:18,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:18,896 INFO L93 Difference]: Finished difference Result 307 states and 730 transitions. [2020-10-11 12:54:18,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 12:54:18,899 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:54:18,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:18,900 INFO L225 Difference]: With dead ends: 307 [2020-10-11 12:54:18,900 INFO L226 Difference]: Without dead ends: 299 [2020-10-11 12:54:18,900 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 12:54:18,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-11 12:54:18,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 155. [2020-10-11 12:54:18,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-11 12:54:18,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 381 transitions. [2020-10-11 12:54:18,903 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 381 transitions. Word has length 14 [2020-10-11 12:54:18,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:18,903 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 381 transitions. [2020-10-11 12:54:18,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:54:18,903 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 381 transitions. [2020-10-11 12:54:18,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:18,903 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:18,903 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:19,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:19,104 INFO L429 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:19,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:19,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1866754364, now seen corresponding path program 236 times [2020-10-11 12:54:19,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:19,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262116380] [2020-10-11 12:54:19,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:19,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262116380] [2020-10-11 12:54:19,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056534922] [2020-10-11 12:54:19,343 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:19,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:54:19,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:19,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:54:19,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:19,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:19,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:54:19,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600972444] [2020-10-11 12:54:19,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:54:19,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:19,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:54:19,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:54:19,733 INFO L87 Difference]: Start difference. First operand 155 states and 381 transitions. Second operand 17 states. [2020-10-11 12:54:20,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:20,362 INFO L93 Difference]: Finished difference Result 225 states and 519 transitions. [2020-10-11 12:54:20,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:54:20,365 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:54:20,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:20,366 INFO L225 Difference]: With dead ends: 225 [2020-10-11 12:54:20,366 INFO L226 Difference]: Without dead ends: 223 [2020-10-11 12:54:20,366 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:54:20,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-11 12:54:20,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 153. [2020-10-11 12:54:20,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-11 12:54:20,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 376 transitions. [2020-10-11 12:54:20,369 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 376 transitions. Word has length 14 [2020-10-11 12:54:20,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:20,369 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 376 transitions. [2020-10-11 12:54:20,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:54:20,369 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 376 transitions. [2020-10-11 12:54:20,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:20,370 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:20,370 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:20,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-10-11 12:54:20,571 INFO L429 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:20,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:20,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1888203884, now seen corresponding path program 237 times [2020-10-11 12:54:20,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:20,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619327851] [2020-10-11 12:54:20,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:20,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619327851] [2020-10-11 12:54:20,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575651335] [2020-10-11 12:54:20,851 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:20,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:54:20,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:20,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:54:20,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:21,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:21,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:21,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:54:21,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322479097] [2020-10-11 12:54:21,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:54:21,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:21,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:54:21,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:54:21,340 INFO L87 Difference]: Start difference. First operand 153 states and 376 transitions. Second operand 17 states. [2020-10-11 12:54:22,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:22,213 INFO L93 Difference]: Finished difference Result 223 states and 512 transitions. [2020-10-11 12:54:22,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:54:22,216 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:54:22,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:22,216 INFO L225 Difference]: With dead ends: 223 [2020-10-11 12:54:22,216 INFO L226 Difference]: Without dead ends: 221 [2020-10-11 12:54:22,217 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:54:22,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-11 12:54:22,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 151. [2020-10-11 12:54:22,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-11 12:54:22,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 371 transitions. [2020-10-11 12:54:22,219 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 371 transitions. Word has length 14 [2020-10-11 12:54:22,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:22,220 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 371 transitions. [2020-10-11 12:54:22,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:54:22,220 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 371 transitions. [2020-10-11 12:54:22,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:22,220 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:22,220 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:22,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2020-10-11 12:54:22,421 INFO L429 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:22,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:22,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1888866974, now seen corresponding path program 238 times [2020-10-11 12:54:22,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:22,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916758683] [2020-10-11 12:54:22,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:22,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916758683] [2020-10-11 12:54:22,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015000479] [2020-10-11 12:54:22,666 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:22,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:54:22,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:22,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:54:22,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:23,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:23,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:54:23,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651461609] [2020-10-11 12:54:23,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:54:23,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:23,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:54:23,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:54:23,342 INFO L87 Difference]: Start difference. First operand 151 states and 371 transitions. Second operand 17 states. [2020-10-11 12:54:24,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:24,649 INFO L93 Difference]: Finished difference Result 221 states and 510 transitions. [2020-10-11 12:54:24,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:54:24,652 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:54:24,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:24,653 INFO L225 Difference]: With dead ends: 221 [2020-10-11 12:54:24,653 INFO L226 Difference]: Without dead ends: 219 [2020-10-11 12:54:24,654 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=229, Invalid=527, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:54:24,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-11 12:54:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 152. [2020-10-11 12:54:24,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-11 12:54:24,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 373 transitions. [2020-10-11 12:54:24,658 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 373 transitions. Word has length 14 [2020-10-11 12:54:24,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:24,658 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 373 transitions. [2020-10-11 12:54:24,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:54:24,658 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 373 transitions. [2020-10-11 12:54:24,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:24,658 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:24,658 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:24,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:24,859 INFO L429 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:24,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:24,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1888889294, now seen corresponding path program 239 times [2020-10-11 12:54:24,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:24,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898038735] [2020-10-11 12:54:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:25,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898038735] [2020-10-11 12:54:25,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591940212] [2020-10-11 12:54:25,110 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:25,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:54:25,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:25,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:54:25,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:25,617 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:54:29,789 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-11 12:54:29,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:29,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:29,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-11 12:54:29,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729992892] [2020-10-11 12:54:29,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 12:54:29,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:29,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 12:54:29,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=213, Unknown=1, NotChecked=0, Total=306 [2020-10-11 12:54:29,793 INFO L87 Difference]: Start difference. First operand 152 states and 373 transitions. Second operand 18 states. [2020-10-11 12:54:51,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:51,399 INFO L93 Difference]: Finished difference Result 252 states and 586 transitions. [2020-10-11 12:54:51,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 12:54:51,426 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-11 12:54:51,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:51,426 INFO L225 Difference]: With dead ends: 252 [2020-10-11 12:54:51,426 INFO L226 Difference]: Without dead ends: 247 [2020-10-11 12:54:51,427 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=334, Invalid=720, Unknown=2, NotChecked=0, Total=1056 [2020-10-11 12:54:51,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-11 12:54:51,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 150. [2020-10-11 12:54:51,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-11 12:54:51,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 366 transitions. [2020-10-11 12:54:51,429 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 366 transitions. Word has length 14 [2020-10-11 12:54:51,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:51,429 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 366 transitions. [2020-10-11 12:54:51,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 12:54:51,429 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 366 transitions. [2020-10-11 12:54:51,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:51,429 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:51,430 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:51,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:51,630 INFO L429 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:51,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:51,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1888918124, now seen corresponding path program 240 times [2020-10-11 12:54:51,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:51,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806537130] [2020-10-11 12:54:51,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:51,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806537130] [2020-10-11 12:54:51,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397502428] [2020-10-11 12:54:51,799 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:51,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:54:51,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:51,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:54:51,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:52,199 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:54:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:52,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:52,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:54:52,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433006874] [2020-10-11 12:54:52,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:54:52,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:52,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:54:52,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:54:52,235 INFO L87 Difference]: Start difference. First operand 150 states and 366 transitions. Second operand 17 states. [2020-10-11 12:54:53,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:53,343 INFO L93 Difference]: Finished difference Result 225 states and 522 transitions. [2020-10-11 12:54:53,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:54:53,346 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:54:53,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:53,346 INFO L225 Difference]: With dead ends: 225 [2020-10-11 12:54:53,346 INFO L226 Difference]: Without dead ends: 220 [2020-10-11 12:54:53,347 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:54:53,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-11 12:54:53,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 146. [2020-10-11 12:54:53,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-11 12:54:53,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 342 transitions. [2020-10-11 12:54:53,350 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 342 transitions. Word has length 14 [2020-10-11 12:54:53,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:53,350 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 342 transitions. [2020-10-11 12:54:53,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:54:53,350 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 342 transitions. [2020-10-11 12:54:53,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:53,350 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:53,350 INFO L421 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:53,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:53,551 INFO L429 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:53,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:53,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1949255125, now seen corresponding path program 7 times [2020-10-11 12:54:53,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:53,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124068421] [2020-10-11 12:54:53,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:53,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124068421] [2020-10-11 12:54:53,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257933223] [2020-10-11 12:54:53,827 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:53,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:54:53,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:54,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-11 12:54:54,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 18 [2020-10-11 12:54:54,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484022884] [2020-10-11 12:54:54,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 12:54:54,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:54,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 12:54:54,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:54:54,035 INFO L87 Difference]: Start difference. First operand 146 states and 342 transitions. Second operand 9 states. [2020-10-11 12:54:54,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:54,103 INFO L93 Difference]: Finished difference Result 235 states and 626 transitions. [2020-10-11 12:54:54,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:54:54,106 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-10-11 12:54:54,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:54,107 INFO L225 Difference]: With dead ends: 235 [2020-10-11 12:54:54,107 INFO L226 Difference]: Without dead ends: 227 [2020-10-11 12:54:54,107 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:54:54,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-11 12:54:54,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2020-10-11 12:54:54,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-11 12:54:54,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 611 transitions. [2020-10-11 12:54:54,111 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 611 transitions. Word has length 14 [2020-10-11 12:54:54,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:54,111 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 611 transitions. [2020-10-11 12:54:54,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 12:54:54,111 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 611 transitions. [2020-10-11 12:54:54,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:54,112 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:54,112 INFO L421 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:54,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:54,313 INFO L429 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:54,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:54,313 INFO L82 PathProgramCache]: Analyzing trace with hash 163688120, now seen corresponding path program 28 times [2020-10-11 12:54:54,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:54,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189219866] [2020-10-11 12:54:54,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:54,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189219866] [2020-10-11 12:54:54,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645910501] [2020-10-11 12:54:54,790 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:54,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:54:54,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:54,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:54:54,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:55,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-11 12:54:55,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 18 [2020-10-11 12:54:55,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135949629] [2020-10-11 12:54:55,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 12:54:55,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:55,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 12:54:55,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:54:55,090 INFO L87 Difference]: Start difference. First operand 227 states and 611 transitions. Second operand 9 states. [2020-10-11 12:54:55,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:55,179 INFO L93 Difference]: Finished difference Result 338 states and 895 transitions. [2020-10-11 12:54:55,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:54:55,183 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-10-11 12:54:55,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:55,184 INFO L225 Difference]: With dead ends: 338 [2020-10-11 12:54:55,184 INFO L226 Difference]: Without dead ends: 312 [2020-10-11 12:54:55,184 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:54:55,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-11 12:54:55,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2020-10-11 12:54:55,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-11 12:54:55,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 836 transitions. [2020-10-11 12:54:55,191 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 836 transitions. Word has length 14 [2020-10-11 12:54:55,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:55,191 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 836 transitions. [2020-10-11 12:54:55,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 12:54:55,191 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 836 transitions. [2020-10-11 12:54:55,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:54:55,192 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:55,192 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:55,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2020-10-11 12:54:55,406 INFO L429 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:55,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:55,407 INFO L82 PathProgramCache]: Analyzing trace with hash 491277249, now seen corresponding path program 241 times [2020-10-11 12:54:55,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:55,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436698252] [2020-10-11 12:54:55,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:55,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:55,729 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:55,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436698252] [2020-10-11 12:54:55,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206044067] [2020-10-11 12:54:55,730 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:55,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:54:55,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:56,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:56,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:54:56,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671140759] [2020-10-11 12:54:56,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:54:56,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:56,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:54:56,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:54:56,226 INFO L87 Difference]: Start difference. First operand 312 states and 836 transitions. Second operand 19 states. [2020-10-11 12:54:56,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:56,329 INFO L93 Difference]: Finished difference Result 353 states and 914 transitions. [2020-10-11 12:54:56,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:54:56,332 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:54:56,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:56,333 INFO L225 Difference]: With dead ends: 353 [2020-10-11 12:54:56,333 INFO L226 Difference]: Without dead ends: 351 [2020-10-11 12:54:56,334 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:54:56,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-11 12:54:56,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 324. [2020-10-11 12:54:56,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-11 12:54:56,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 870 transitions. [2020-10-11 12:54:56,338 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 870 transitions. Word has length 15 [2020-10-11 12:54:56,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:56,338 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 870 transitions. [2020-10-11 12:54:56,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:54:56,338 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 870 transitions. [2020-10-11 12:54:56,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:54:56,339 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:56,339 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:56,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:56,540 INFO L429 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:56,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:56,540 INFO L82 PathProgramCache]: Analyzing trace with hash 491278210, now seen corresponding path program 242 times [2020-10-11 12:54:56,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:56,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229801863] [2020-10-11 12:54:56,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:56,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229801863] [2020-10-11 12:54:56,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862294749] [2020-10-11 12:54:56,864 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:56,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:54:56,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:56,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:54:56,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:57,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:57,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:57,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:54:57,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898210338] [2020-10-11 12:54:57,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:54:57,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:57,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:54:57,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:54:57,428 INFO L87 Difference]: Start difference. First operand 324 states and 870 transitions. Second operand 19 states. [2020-10-11 12:54:58,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:58,100 INFO L93 Difference]: Finished difference Result 377 states and 965 transitions. [2020-10-11 12:54:58,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:54:58,103 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:54:58,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:58,104 INFO L225 Difference]: With dead ends: 377 [2020-10-11 12:54:58,104 INFO L226 Difference]: Without dead ends: 374 [2020-10-11 12:54:58,105 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:54:58,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-10-11 12:54:58,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 325. [2020-10-11 12:54:58,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-11 12:54:58,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 873 transitions. [2020-10-11 12:54:58,110 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 873 transitions. Word has length 15 [2020-10-11 12:54:58,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:58,110 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 873 transitions. [2020-10-11 12:54:58,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:54:58,111 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 873 transitions. [2020-10-11 12:54:58,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:54:58,111 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:58,111 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:58,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2020-10-11 12:54:58,312 INFO L429 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:58,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:58,312 INFO L82 PathProgramCache]: Analyzing trace with hash 491307040, now seen corresponding path program 243 times [2020-10-11 12:54:58,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:58,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156142380] [2020-10-11 12:54:58,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:58,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:58,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156142380] [2020-10-11 12:54:58,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374249376] [2020-10-11 12:54:58,530 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:58,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:54:58,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:58,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:54:58,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:59,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:59,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:59,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:54:59,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319611025] [2020-10-11 12:54:59,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:54:59,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:59,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:54:59,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:54:59,202 INFO L87 Difference]: Start difference. First operand 325 states and 873 transitions. Second operand 19 states. [2020-10-11 12:55:00,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:55:00,062 INFO L93 Difference]: Finished difference Result 408 states and 1035 transitions. [2020-10-11 12:55:00,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:55:00,065 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:55:00,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:55:00,066 INFO L225 Difference]: With dead ends: 408 [2020-10-11 12:55:00,067 INFO L226 Difference]: Without dead ends: 404 [2020-10-11 12:55:00,067 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:55:00,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-11 12:55:00,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 327. [2020-10-11 12:55:00,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-10-11 12:55:00,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 879 transitions. [2020-10-11 12:55:00,071 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 879 transitions. Word has length 15 [2020-10-11 12:55:00,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:55:00,071 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 879 transitions. [2020-10-11 12:55:00,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:55:00,072 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 879 transitions. [2020-10-11 12:55:00,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:55:00,072 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:55:00,072 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:55:00,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:00,273 INFO L429 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:55:00,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:55:00,273 INFO L82 PathProgramCache]: Analyzing trace with hash 492200770, now seen corresponding path program 244 times [2020-10-11 12:55:00,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:55:00,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027268053] [2020-10-11 12:55:00,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:55:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:00,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027268053] [2020-10-11 12:55:00,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840556941] [2020-10-11 12:55:00,586 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:00,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:55:00,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:55:00,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:55:00,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:55:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:09,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:55:09,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-10-11 12:55:09,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227802416] [2020-10-11 12:55:09,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 12:55:09,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:55:09,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 12:55:09,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=252, Unknown=4, NotChecked=0, Total=380 [2020-10-11 12:55:09,229 INFO L87 Difference]: Start difference. First operand 327 states and 879 transitions. Second operand 20 states. [2020-10-11 12:55:11,827 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-11 12:55:24,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:55:24,406 INFO L93 Difference]: Finished difference Result 412 states and 1037 transitions. [2020-10-11 12:55:24,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:55:24,409 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-10-11 12:55:24,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:55:24,410 INFO L225 Difference]: With dead ends: 412 [2020-10-11 12:55:24,411 INFO L226 Difference]: Without dead ends: 409 [2020-10-11 12:55:24,411 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=266, Invalid=486, Unknown=4, NotChecked=0, Total=756 [2020-10-11 12:55:24,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-10-11 12:55:24,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 329. [2020-10-11 12:55:24,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-10-11 12:55:24,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 885 transitions. [2020-10-11 12:55:24,418 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 885 transitions. Word has length 15 [2020-10-11 12:55:24,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:55:24,418 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 885 transitions. [2020-10-11 12:55:24,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 12:55:24,419 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 885 transitions. [2020-10-11 12:55:24,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:55:24,419 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:55:24,420 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:55:24,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-10-11 12:55:24,631 INFO L429 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:55:24,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:55:24,632 INFO L82 PathProgramCache]: Analyzing trace with hash 492201731, now seen corresponding path program 245 times [2020-10-11 12:55:24,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:55:24,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924044260] [2020-10-11 12:55:24,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:55:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:24,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924044260] [2020-10-11 12:55:24,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520170280] [2020-10-11 12:55:24,993 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:25,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:55:25,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:55:25,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:55:25,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:55:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:27,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:55:27,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:55:27,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399679836] [2020-10-11 12:55:27,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:55:27,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:55:27,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:55:27,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=236, Unknown=1, NotChecked=0, Total=342 [2020-10-11 12:55:27,834 INFO L87 Difference]: Start difference. First operand 329 states and 885 transitions. Second operand 19 states. [2020-10-11 12:55:32,286 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-11 12:55:32,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:55:32,946 INFO L93 Difference]: Finished difference Result 437 states and 1102 transitions. [2020-10-11 12:55:32,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:55:32,950 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:55:32,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:55:32,951 INFO L225 Difference]: With dead ends: 437 [2020-10-11 12:55:32,951 INFO L226 Difference]: Without dead ends: 432 [2020-10-11 12:55:32,951 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=231, Invalid=470, Unknown=1, NotChecked=0, Total=702 [2020-10-11 12:55:32,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-11 12:55:32,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 330. [2020-10-11 12:55:32,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-11 12:55:32,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 888 transitions. [2020-10-11 12:55:32,957 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 888 transitions. Word has length 15 [2020-10-11 12:55:32,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:55:32,957 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 888 transitions. [2020-10-11 12:55:32,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:55:32,957 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 888 transitions. [2020-10-11 12:55:32,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:55:32,958 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:55:32,958 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:55:33,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:33,159 INFO L429 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:55:33,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:55:33,159 INFO L82 PathProgramCache]: Analyzing trace with hash 492230561, now seen corresponding path program 246 times [2020-10-11 12:55:33,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:55:33,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734491536] [2020-10-11 12:55:33,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:55:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:33,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734491536] [2020-10-11 12:55:33,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637688314] [2020-10-11 12:55:33,472 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:33,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:55:33,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:55:33,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:55:33,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:55:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:34,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:55:34,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:55:34,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543890001] [2020-10-11 12:55:34,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:55:34,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:55:34,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:55:34,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:55:34,231 INFO L87 Difference]: Start difference. First operand 330 states and 888 transitions. Second operand 19 states. [2020-10-11 12:55:35,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:55:35,242 INFO L93 Difference]: Finished difference Result 427 states and 1079 transitions. [2020-10-11 12:55:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:55:35,245 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:55:35,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:55:35,246 INFO L225 Difference]: With dead ends: 427 [2020-10-11 12:55:35,246 INFO L226 Difference]: Without dead ends: 423 [2020-10-11 12:55:35,247 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:55:35,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-11 12:55:35,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 330. [2020-10-11 12:55:35,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-11 12:55:35,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 888 transitions. [2020-10-11 12:55:35,252 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 888 transitions. Word has length 15 [2020-10-11 12:55:35,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:55:35,252 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 888 transitions. [2020-10-11 12:55:35,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:55:35,252 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 888 transitions. [2020-10-11 12:55:35,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:55:35,252 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:55:35,252 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:55:35,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:35,453 INFO L429 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:55:35,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:55:35,454 INFO L82 PathProgramCache]: Analyzing trace with hash 519906400, now seen corresponding path program 247 times [2020-10-11 12:55:35,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:55:35,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623318578] [2020-10-11 12:55:35,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:55:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:35,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623318578] [2020-10-11 12:55:35,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994188895] [2020-10-11 12:55:35,762 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:35,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:55:35,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:55:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:36,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:55:36,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:55:36,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045803016] [2020-10-11 12:55:36,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:55:36,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:55:36,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:55:36,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:55:36,479 INFO L87 Difference]: Start difference. First operand 330 states and 888 transitions. Second operand 19 states. [2020-10-11 12:55:37,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:55:37,735 INFO L93 Difference]: Finished difference Result 411 states and 1040 transitions. [2020-10-11 12:55:37,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:55:37,739 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:55:37,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:55:37,740 INFO L225 Difference]: With dead ends: 411 [2020-10-11 12:55:37,741 INFO L226 Difference]: Without dead ends: 408 [2020-10-11 12:55:37,741 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:55:37,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-10-11 12:55:37,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 333. [2020-10-11 12:55:37,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-11 12:55:37,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 897 transitions. [2020-10-11 12:55:37,746 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 897 transitions. Word has length 15 [2020-10-11 12:55:37,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:55:37,746 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 897 transitions. [2020-10-11 12:55:37,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:55:37,746 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 897 transitions. [2020-10-11 12:55:37,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:55:37,747 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:55:37,747 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:55:37,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2020-10-11 12:55:37,948 INFO L429 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:55:37,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:55:37,948 INFO L82 PathProgramCache]: Analyzing trace with hash 519907361, now seen corresponding path program 248 times [2020-10-11 12:55:37,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:55:37,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286062971] [2020-10-11 12:55:37,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:55:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:38,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286062971] [2020-10-11 12:55:38,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532171831] [2020-10-11 12:55:38,260 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 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:38,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:55:38,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:55:38,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:55:38,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:55:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:38,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:55:38,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:55:38,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028858073] [2020-10-11 12:55:38,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:55:38,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:55:38,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:55:38,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:55:38,905 INFO L87 Difference]: Start difference. First operand 333 states and 897 transitions. Second operand 19 states. [2020-10-11 12:55:40,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:55:40,020 INFO L93 Difference]: Finished difference Result 441 states and 1112 transitions. [2020-10-11 12:55:40,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:55:40,023 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:55:40,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:55:40,025 INFO L225 Difference]: With dead ends: 441 [2020-10-11 12:55:40,025 INFO L226 Difference]: Without dead ends: 436 [2020-10-11 12:55:40,025 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:55:40,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-10-11 12:55:40,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 333. [2020-10-11 12:55:40,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-11 12:55:40,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 897 transitions. [2020-10-11 12:55:40,030 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 897 transitions. Word has length 15 [2020-10-11 12:55:40,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:55:40,030 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 897 transitions. [2020-10-11 12:55:40,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:55:40,030 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 897 transitions. [2020-10-11 12:55:40,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:55:40,031 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:55:40,031 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:55:40,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:40,231 INFO L429 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:55:40,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:55:40,232 INFO L82 PathProgramCache]: Analyzing trace with hash 519936191, now seen corresponding path program 249 times [2020-10-11 12:55:40,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:55:40,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190486135] [2020-10-11 12:55:40,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:55:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:40,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190486135] [2020-10-11 12:55:40,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825113397] [2020-10-11 12:55:40,530 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:40,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:55:40,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:55:40,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:55:40,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:55:56,709 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-11 12:56:04,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:04,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:04,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:04,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138749796] [2020-10-11 12:56:04,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:04,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:04,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:04,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=231, Unknown=6, NotChecked=0, Total=342 [2020-10-11 12:56:04,157 INFO L87 Difference]: Start difference. First operand 333 states and 897 transitions. Second operand 19 states. [2020-10-11 12:56:08,535 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-11 12:56:27,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:27,361 INFO L93 Difference]: Finished difference Result 453 states and 1140 transitions. [2020-10-11 12:56:27,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:56:27,364 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:27,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:27,365 INFO L225 Difference]: With dead ends: 453 [2020-10-11 12:56:27,366 INFO L226 Difference]: Without dead ends: 448 [2020-10-11 12:56:27,366 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=274, Invalid=530, Unknown=8, NotChecked=0, Total=812 [2020-10-11 12:56:27,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2020-10-11 12:56:27,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 334. [2020-10-11 12:56:27,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-11 12:56:27,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 900 transitions. [2020-10-11 12:56:27,371 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 900 transitions. Word has length 15 [2020-10-11 12:56:27,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:27,371 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 900 transitions. [2020-10-11 12:56:27,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:27,371 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 900 transitions. [2020-10-11 12:56:27,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:27,372 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:27,372 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:27,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:27,572 INFO L429 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:27,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:27,573 INFO L82 PathProgramCache]: Analyzing trace with hash 520830882, now seen corresponding path program 250 times [2020-10-11 12:56:27,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:27,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895685123] [2020-10-11 12:56:27,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:27,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895685123] [2020-10-11 12:56:27,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789717997] [2020-10-11 12:56:27,864 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:27,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:56:27,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:56:27,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:27,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:31,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:31,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:31,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123387190] [2020-10-11 12:56:31,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:31,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:31,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:31,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:56:31,961 INFO L87 Difference]: Start difference. First operand 334 states and 900 transitions. Second operand 19 states. [2020-10-11 12:56:33,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:33,063 INFO L93 Difference]: Finished difference Result 464 states and 1169 transitions. [2020-10-11 12:56:33,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:56:33,067 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:33,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:33,068 INFO L225 Difference]: With dead ends: 464 [2020-10-11 12:56:33,068 INFO L226 Difference]: Without dead ends: 458 [2020-10-11 12:56:33,068 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:56:33,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-10-11 12:56:33,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 334. [2020-10-11 12:56:33,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-11 12:56:33,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 900 transitions. [2020-10-11 12:56:33,073 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 900 transitions. Word has length 15 [2020-10-11 12:56:33,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:33,073 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 900 transitions. [2020-10-11 12:56:33,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:33,074 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 900 transitions. [2020-10-11 12:56:33,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:33,074 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:33,074 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:33,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:33,275 INFO L429 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:33,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:33,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1378780930, now seen corresponding path program 251 times [2020-10-11 12:56:33,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:33,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372509338] [2020-10-11 12:56:33,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:33,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372509338] [2020-10-11 12:56:33,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607424495] [2020-10-11 12:56:33,591 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:33,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:56:33,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:56:33,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:33,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:34,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:34,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:34,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295971998] [2020-10-11 12:56:34,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:34,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:34,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:34,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:56:34,104 INFO L87 Difference]: Start difference. First operand 334 states and 900 transitions. Second operand 19 states. [2020-10-11 12:56:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:35,097 INFO L93 Difference]: Finished difference Result 414 states and 1047 transitions. [2020-10-11 12:56:35,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:56:35,100 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:35,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:35,101 INFO L225 Difference]: With dead ends: 414 [2020-10-11 12:56:35,102 INFO L226 Difference]: Without dead ends: 411 [2020-10-11 12:56:35,102 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:56:35,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-11 12:56:35,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 338. [2020-10-11 12:56:35,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-11 12:56:35,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 912 transitions. [2020-10-11 12:56:35,106 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 912 transitions. Word has length 15 [2020-10-11 12:56:35,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:35,106 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 912 transitions. [2020-10-11 12:56:35,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:35,106 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 912 transitions. [2020-10-11 12:56:35,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:35,106 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:35,106 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:35,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:35,307 INFO L429 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:35,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:35,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1378781891, now seen corresponding path program 252 times [2020-10-11 12:56:35,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:35,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712585718] [2020-10-11 12:56:35,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:35,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:35,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712585718] [2020-10-11 12:56:35,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095530080] [2020-10-11 12:56:35,621 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:35,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:56:35,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:56:35,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:35,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:36,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:36,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:36,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:36,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829190683] [2020-10-11 12:56:36,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:36,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:36,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:36,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:56:36,152 INFO L87 Difference]: Start difference. First operand 338 states and 912 transitions. Second operand 19 states. [2020-10-11 12:56:37,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:37,128 INFO L93 Difference]: Finished difference Result 441 states and 1109 transitions. [2020-10-11 12:56:37,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:56:37,130 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:37,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:37,132 INFO L225 Difference]: With dead ends: 441 [2020-10-11 12:56:37,132 INFO L226 Difference]: Without dead ends: 437 [2020-10-11 12:56:37,132 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2020-10-11 12:56:37,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-11 12:56:37,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 337. [2020-10-11 12:56:37,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-11 12:56:37,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 909 transitions. [2020-10-11 12:56:37,141 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 909 transitions. Word has length 15 [2020-10-11 12:56:37,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:37,142 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 909 transitions. [2020-10-11 12:56:37,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:37,142 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 909 transitions. [2020-10-11 12:56:37,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:37,142 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:37,142 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:37,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-10-11 12:56:37,343 INFO L429 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:37,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:37,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1378810721, now seen corresponding path program 253 times [2020-10-11 12:56:37,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:37,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94487139] [2020-10-11 12:56:37,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:37,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94487139] [2020-10-11 12:56:37,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539144693] [2020-10-11 12:56:37,691 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:37,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:37,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:40,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:40,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:40,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379798250] [2020-10-11 12:56:40,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:40,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:40,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:40,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:56:40,512 INFO L87 Difference]: Start difference. First operand 337 states and 909 transitions. Second operand 19 states. [2020-10-11 12:56:41,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:41,745 INFO L93 Difference]: Finished difference Result 454 states and 1141 transitions. [2020-10-11 12:56:41,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:56:41,749 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:41,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:41,751 INFO L225 Difference]: With dead ends: 454 [2020-10-11 12:56:41,751 INFO L226 Difference]: Without dead ends: 449 [2020-10-11 12:56:41,751 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:56:41,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-10-11 12:56:41,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 336. [2020-10-11 12:56:41,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-11 12:56:41,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 906 transitions. [2020-10-11 12:56:41,757 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 906 transitions. Word has length 15 [2020-10-11 12:56:41,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:41,757 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 906 transitions. [2020-10-11 12:56:41,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:41,757 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 906 transitions. [2020-10-11 12:56:41,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:41,758 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:41,758 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:41,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-10-11 12:56:41,959 INFO L429 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:41,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:41,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1379704451, now seen corresponding path program 254 times [2020-10-11 12:56:41,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:41,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53519129] [2020-10-11 12:56:41,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:42,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53519129] [2020-10-11 12:56:42,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182674201] [2020-10-11 12:56:42,248 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:42,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:56:42,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:56:42,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:42,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:42,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:42,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:42,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:42,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286935024] [2020-10-11 12:56:42,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:42,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:42,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:42,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:56:42,729 INFO L87 Difference]: Start difference. First operand 336 states and 906 transitions. Second operand 19 states. [2020-10-11 12:56:43,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:43,791 INFO L93 Difference]: Finished difference Result 464 states and 1163 transitions. [2020-10-11 12:56:43,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:56:43,794 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:43,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:43,795 INFO L225 Difference]: With dead ends: 464 [2020-10-11 12:56:43,795 INFO L226 Difference]: Without dead ends: 459 [2020-10-11 12:56:43,796 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:56:43,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-10-11 12:56:43,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 341. [2020-10-11 12:56:43,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-11 12:56:43,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 921 transitions. [2020-10-11 12:56:43,801 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 921 transitions. Word has length 15 [2020-10-11 12:56:43,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:43,801 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 921 transitions. [2020-10-11 12:56:43,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:43,801 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 921 transitions. [2020-10-11 12:56:43,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:43,801 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:43,802 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:44,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-10-11 12:56:44,002 INFO L429 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:44,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:44,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1379705412, now seen corresponding path program 255 times [2020-10-11 12:56:44,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:44,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954748744] [2020-10-11 12:56:44,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:44,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954748744] [2020-10-11 12:56:44,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356034504] [2020-10-11 12:56:44,299 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:44,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:56:44,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:56:44,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:44,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:44,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:44,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:44,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314241726] [2020-10-11 12:56:44,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:44,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:44,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:44,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:56:44,748 INFO L87 Difference]: Start difference. First operand 341 states and 921 transitions. Second operand 19 states. [2020-10-11 12:56:45,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:45,721 INFO L93 Difference]: Finished difference Result 475 states and 1194 transitions. [2020-10-11 12:56:45,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:56:45,725 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:45,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:45,726 INFO L225 Difference]: With dead ends: 475 [2020-10-11 12:56:45,726 INFO L226 Difference]: Without dead ends: 469 [2020-10-11 12:56:45,727 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:56:45,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-10-11 12:56:45,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 342. [2020-10-11 12:56:45,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-10-11 12:56:45,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 924 transitions. [2020-10-11 12:56:45,732 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 924 transitions. Word has length 15 [2020-10-11 12:56:45,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:45,732 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 924 transitions. [2020-10-11 12:56:45,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:45,732 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 924 transitions. [2020-10-11 12:56:45,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:45,732 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:45,732 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:45,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:45,933 INFO L429 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:45,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:45,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1379734242, now seen corresponding path program 256 times [2020-10-11 12:56:45,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:45,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481916951] [2020-10-11 12:56:45,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:46,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481916951] [2020-10-11 12:56:46,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199870486] [2020-10-11 12:56:46,224 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:46,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:56:46,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:56:46,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:46,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:46,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:46,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:46,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107722367] [2020-10-11 12:56:46,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:46,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:46,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:46,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:56:46,759 INFO L87 Difference]: Start difference. First operand 342 states and 924 transitions. Second operand 19 states. [2020-10-11 12:56:48,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:48,076 INFO L93 Difference]: Finished difference Result 474 states and 1199 transitions. [2020-10-11 12:56:48,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:56:48,080 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:48,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:48,081 INFO L225 Difference]: With dead ends: 474 [2020-10-11 12:56:48,081 INFO L226 Difference]: Without dead ends: 468 [2020-10-11 12:56:48,082 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:56:48,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-10-11 12:56:48,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 340. [2020-10-11 12:56:48,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-11 12:56:48,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 918 transitions. [2020-10-11 12:56:48,094 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 918 transitions. Word has length 15 [2020-10-11 12:56:48,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:48,094 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 918 transitions. [2020-10-11 12:56:48,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:48,094 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 918 transitions. [2020-10-11 12:56:48,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:48,094 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:48,094 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:48,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2020-10-11 12:56:48,295 INFO L429 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:48,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:48,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1407411042, now seen corresponding path program 257 times [2020-10-11 12:56:48,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:48,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982254485] [2020-10-11 12:56:48,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:48,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982254485] [2020-10-11 12:56:48,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020584965] [2020-10-11 12:56:48,573 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 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:48,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:56:48,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:56:48,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:48,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:49,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:49,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:49,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:49,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82551541] [2020-10-11 12:56:49,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:49,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:49,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:49,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:56:49,195 INFO L87 Difference]: Start difference. First operand 340 states and 918 transitions. Second operand 19 states. [2020-10-11 12:56:50,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:50,735 INFO L93 Difference]: Finished difference Result 478 states and 1207 transitions. [2020-10-11 12:56:50,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:56:50,739 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:50,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:50,740 INFO L225 Difference]: With dead ends: 478 [2020-10-11 12:56:50,740 INFO L226 Difference]: Without dead ends: 472 [2020-10-11 12:56:50,740 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=318, Invalid=674, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:56:50,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-10-11 12:56:50,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 340. [2020-10-11 12:56:50,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-11 12:56:50,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 918 transitions. [2020-10-11 12:56:50,745 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 918 transitions. Word has length 15 [2020-10-11 12:56:50,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:50,746 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 918 transitions. [2020-10-11 12:56:50,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:50,746 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 918 transitions. [2020-10-11 12:56:50,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:50,746 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:50,746 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:50,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2020-10-11 12:56:50,947 INFO L429 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:50,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:50,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1407439872, now seen corresponding path program 258 times [2020-10-11 12:56:50,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:50,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560279713] [2020-10-11 12:56:50,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:51,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:51,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560279713] [2020-10-11 12:56:51,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823164686] [2020-10-11 12:56:51,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:51,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:56:51,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:56:51,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:51,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:56,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:56,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:56,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036465546] [2020-10-11 12:56:56,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:56,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:56,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:56,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=243, Unknown=2, NotChecked=0, Total=342 [2020-10-11 12:56:56,269 INFO L87 Difference]: Start difference. First operand 340 states and 918 transitions. Second operand 19 states. [2020-10-11 12:57:00,877 WARN L193 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-11 12:57:05,227 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-11 12:57:07,892 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-11 12:57:08,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:08,276 INFO L93 Difference]: Finished difference Result 461 states and 1164 transitions. [2020-10-11 12:57:08,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:57:08,280 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:08,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:08,281 INFO L225 Difference]: With dead ends: 461 [2020-10-11 12:57:08,281 INFO L226 Difference]: Without dead ends: 456 [2020-10-11 12:57:08,281 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=292, Invalid=636, Unknown=2, NotChecked=0, Total=930 [2020-10-11 12:57:08,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-10-11 12:57:08,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 338. [2020-10-11 12:57:08,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-11 12:57:08,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 912 transitions. [2020-10-11 12:57:08,286 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 912 transitions. Word has length 15 [2020-10-11 12:57:08,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:08,286 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 912 transitions. [2020-10-11 12:57:08,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:08,287 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 912 transitions. [2020-10-11 12:57:08,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:08,287 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:08,287 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:08,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:08,488 INFO L429 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:08,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:08,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1408364354, now seen corresponding path program 259 times [2020-10-11 12:57:08,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:08,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15132748] [2020-10-11 12:57:08,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:08,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15132748] [2020-10-11 12:57:08,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499796042] [2020-10-11 12:57:08,811 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 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:08,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:08,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:09,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:09,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:09,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153793379] [2020-10-11 12:57:09,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:09,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:09,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:09,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:09,350 INFO L87 Difference]: Start difference. First operand 338 states and 912 transitions. Second operand 19 states. [2020-10-11 12:57:10,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:10,269 INFO L93 Difference]: Finished difference Result 438 states and 1112 transitions. [2020-10-11 12:57:10,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:57:10,273 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:10,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:10,275 INFO L225 Difference]: With dead ends: 438 [2020-10-11 12:57:10,275 INFO L226 Difference]: Without dead ends: 417 [2020-10-11 12:57:10,275 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:57:10,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-11 12:57:10,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 339. [2020-10-11 12:57:10,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-11 12:57:10,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 907 transitions. [2020-10-11 12:57:10,280 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 907 transitions. Word has length 15 [2020-10-11 12:57:10,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:10,281 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 907 transitions. [2020-10-11 12:57:10,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:10,281 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 907 transitions. [2020-10-11 12:57:10,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:10,281 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:10,281 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:10,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:10,482 INFO L429 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:10,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:10,482 INFO L82 PathProgramCache]: Analyzing trace with hash -2060879712, now seen corresponding path program 260 times [2020-10-11 12:57:10,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:10,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35022994] [2020-10-11 12:57:10,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:10,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35022994] [2020-10-11 12:57:10,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115775327] [2020-10-11 12:57:10,869 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 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:10,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:57:10,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:10,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:10,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:11,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:11,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:11,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149641349] [2020-10-11 12:57:11,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:11,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:11,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:11,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:11,417 INFO L87 Difference]: Start difference. First operand 339 states and 907 transitions. Second operand 19 states. [2020-10-11 12:57:12,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:12,368 INFO L93 Difference]: Finished difference Result 406 states and 1029 transitions. [2020-10-11 12:57:12,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:57:12,372 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:12,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:12,373 INFO L225 Difference]: With dead ends: 406 [2020-10-11 12:57:12,374 INFO L226 Difference]: Without dead ends: 403 [2020-10-11 12:57:12,374 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:57:12,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-11 12:57:12,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 345. [2020-10-11 12:57:12,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-11 12:57:12,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 923 transitions. [2020-10-11 12:57:12,379 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 923 transitions. Word has length 15 [2020-10-11 12:57:12,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:12,380 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 923 transitions. [2020-10-11 12:57:12,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:12,380 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 923 transitions. [2020-10-11 12:57:12,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:12,380 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:12,380 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:12,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:12,581 INFO L429 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:12,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:12,582 INFO L82 PathProgramCache]: Analyzing trace with hash -2060878751, now seen corresponding path program 261 times [2020-10-11 12:57:12,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:12,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193616457] [2020-10-11 12:57:12,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:12,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:12,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193616457] [2020-10-11 12:57:12,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485106633] [2020-10-11 12:57:12,921 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 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:12,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 12:57:12,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:12,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:12,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:13,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:13,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:13,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795577908] [2020-10-11 12:57:13,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:13,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:13,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:13,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:13,447 INFO L87 Difference]: Start difference. First operand 345 states and 923 transitions. Second operand 19 states. [2020-10-11 12:57:14,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:14,320 INFO L93 Difference]: Finished difference Result 436 states and 1098 transitions. [2020-10-11 12:57:14,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:57:14,323 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:14,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:14,324 INFO L225 Difference]: With dead ends: 436 [2020-10-11 12:57:14,324 INFO L226 Difference]: Without dead ends: 432 [2020-10-11 12:57:14,325 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:57:14,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-11 12:57:14,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 344. [2020-10-11 12:57:14,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-11 12:57:14,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 920 transitions. [2020-10-11 12:57:14,331 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 920 transitions. Word has length 15 [2020-10-11 12:57:14,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:14,331 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 920 transitions. [2020-10-11 12:57:14,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:14,331 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 920 transitions. [2020-10-11 12:57:14,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:14,331 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:14,331 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:14,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable296 [2020-10-11 12:57:14,532 INFO L429 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:14,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:14,533 INFO L82 PathProgramCache]: Analyzing trace with hash -2060849921, now seen corresponding path program 262 times [2020-10-11 12:57:14,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:14,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773393404] [2020-10-11 12:57:14,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:14,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773393404] [2020-10-11 12:57:14,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38741224] [2020-10-11 12:57:14,883 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 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:14,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:57:14,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:14,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:14,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:15,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:15,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:15,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:15,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340093819] [2020-10-11 12:57:15,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:15,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:15,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:15,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:15,768 INFO L87 Difference]: Start difference. First operand 344 states and 920 transitions. Second operand 19 states. [2020-10-11 12:57:16,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:16,934 INFO L93 Difference]: Finished difference Result 452 states and 1133 transitions. [2020-10-11 12:57:16,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:57:16,939 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:16,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:16,940 INFO L225 Difference]: With dead ends: 452 [2020-10-11 12:57:16,940 INFO L226 Difference]: Without dead ends: 447 [2020-10-11 12:57:16,940 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:57:16,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-10-11 12:57:16,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 343. [2020-10-11 12:57:16,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-10-11 12:57:16,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 917 transitions. [2020-10-11 12:57:16,945 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 917 transitions. Word has length 15 [2020-10-11 12:57:16,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:16,946 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 917 transitions. [2020-10-11 12:57:16,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:16,946 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 917 transitions. [2020-10-11 12:57:16,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:16,946 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:16,946 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:17,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:17,149 INFO L429 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:17,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:17,150 INFO L82 PathProgramCache]: Analyzing trace with hash -2059956191, now seen corresponding path program 263 times [2020-10-11 12:57:17,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:17,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806568861] [2020-10-11 12:57:17,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:17,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:17,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806568861] [2020-10-11 12:57:17,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960264106] [2020-10-11 12:57:17,518 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 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:17,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 12:57:17,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:17,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:17,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:18,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:18,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:18,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497545142] [2020-10-11 12:57:18,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:18,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:18,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:18,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:18,179 INFO L87 Difference]: Start difference. First operand 343 states and 917 transitions. Second operand 19 states. [2020-10-11 12:57:19,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:19,618 INFO L93 Difference]: Finished difference Result 451 states and 1130 transitions. [2020-10-11 12:57:19,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:57:19,621 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:19,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:19,622 INFO L225 Difference]: With dead ends: 451 [2020-10-11 12:57:19,622 INFO L226 Difference]: Without dead ends: 446 [2020-10-11 12:57:19,623 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2020-10-11 12:57:19,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-11 12:57:19,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 350. [2020-10-11 12:57:19,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-11 12:57:19,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 936 transitions. [2020-10-11 12:57:19,628 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 936 transitions. Word has length 15 [2020-10-11 12:57:19,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:19,629 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 936 transitions. [2020-10-11 12:57:19,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:19,629 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 936 transitions. [2020-10-11 12:57:19,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:19,629 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:19,629 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:19,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2020-10-11 12:57:19,830 INFO L429 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:19,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:19,831 INFO L82 PathProgramCache]: Analyzing trace with hash -2059955230, now seen corresponding path program 264 times [2020-10-11 12:57:19,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:19,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219533655] [2020-10-11 12:57:19,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:20,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219533655] [2020-10-11 12:57:20,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685709290] [2020-10-11 12:57:20,167 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 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:20,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:57:20,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:20,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:20,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:25,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:25,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:25,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:25,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905265834] [2020-10-11 12:57:25,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:25,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:25,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:25,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=243, Unknown=2, NotChecked=0, Total=342 [2020-10-11 12:57:25,203 INFO L87 Difference]: Start difference. First operand 350 states and 936 transitions. Second operand 19 states. [2020-10-11 12:57:30,015 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-11 12:57:34,281 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-11 12:57:36,882 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-11 12:57:37,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:37,611 INFO L93 Difference]: Finished difference Result 481 states and 1200 transitions. [2020-10-11 12:57:37,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:57:37,616 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:37,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:37,623 INFO L225 Difference]: With dead ends: 481 [2020-10-11 12:57:37,623 INFO L226 Difference]: Without dead ends: 475 [2020-10-11 12:57:37,623 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=292, Invalid=636, Unknown=2, NotChecked=0, Total=930 [2020-10-11 12:57:37,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-10-11 12:57:37,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 353. [2020-10-11 12:57:37,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-10-11 12:57:37,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 945 transitions. [2020-10-11 12:57:37,628 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 945 transitions. Word has length 15 [2020-10-11 12:57:37,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:37,628 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 945 transitions. [2020-10-11 12:57:37,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:37,629 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 945 transitions. [2020-10-11 12:57:37,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:37,629 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:37,629 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:37,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-10-11 12:57:37,830 INFO L429 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:37,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:37,831 INFO L82 PathProgramCache]: Analyzing trace with hash -2059926400, now seen corresponding path program 265 times [2020-10-11 12:57:37,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:37,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778400951] [2020-10-11 12:57:37,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:38,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778400951] [2020-10-11 12:57:38,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188587180] [2020-10-11 12:57:38,205 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 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:38,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:38,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:38,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:38,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:38,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892506441] [2020-10-11 12:57:38,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:38,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:38,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:38,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:38,920 INFO L87 Difference]: Start difference. First operand 353 states and 945 transitions. Second operand 19 states. [2020-10-11 12:57:40,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:40,697 INFO L93 Difference]: Finished difference Result 482 states and 1207 transitions. [2020-10-11 12:57:40,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:57:40,700 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:40,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:40,701 INFO L225 Difference]: With dead ends: 482 [2020-10-11 12:57:40,701 INFO L226 Difference]: Without dead ends: 476 [2020-10-11 12:57:40,701 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 12:57:40,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-10-11 12:57:40,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 351. [2020-10-11 12:57:40,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-11 12:57:40,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 939 transitions. [2020-10-11 12:57:40,706 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 939 transitions. Word has length 15 [2020-10-11 12:57:40,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:40,707 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 939 transitions. [2020-10-11 12:57:40,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:40,707 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 939 transitions. [2020-10-11 12:57:40,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:40,707 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:40,707 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:40,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2020-10-11 12:57:40,908 INFO L429 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:40,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:40,909 INFO L82 PathProgramCache]: Analyzing trace with hash -2032250561, now seen corresponding path program 266 times [2020-10-11 12:57:40,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:40,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782460444] [2020-10-11 12:57:40,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:40,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:41,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:41,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782460444] [2020-10-11 12:57:41,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278669911] [2020-10-11 12:57:41,259 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 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:41,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:57:41,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:41,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:41,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:41,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:41,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:41,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:41,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131756744] [2020-10-11 12:57:41,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:41,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:41,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:41,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:41,842 INFO L87 Difference]: Start difference. First operand 351 states and 939 transitions. Second operand 19 states. [2020-10-11 12:57:43,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:43,057 INFO L93 Difference]: Finished difference Result 460 states and 1154 transitions. [2020-10-11 12:57:43,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:57:43,060 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:43,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:43,061 INFO L225 Difference]: With dead ends: 460 [2020-10-11 12:57:43,061 INFO L226 Difference]: Without dead ends: 455 [2020-10-11 12:57:43,061 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:57:43,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-10-11 12:57:43,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 356. [2020-10-11 12:57:43,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-11 12:57:43,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 952 transitions. [2020-10-11 12:57:43,064 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 952 transitions. Word has length 15 [2020-10-11 12:57:43,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:43,065 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 952 transitions. [2020-10-11 12:57:43,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:43,065 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 952 transitions. [2020-10-11 12:57:43,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:43,065 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:43,065 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:43,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2020-10-11 12:57:43,266 INFO L429 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:43,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:43,267 INFO L82 PathProgramCache]: Analyzing trace with hash -2032220770, now seen corresponding path program 267 times [2020-10-11 12:57:43,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:43,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464707727] [2020-10-11 12:57:43,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:43,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:43,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464707727] [2020-10-11 12:57:43,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710311450] [2020-10-11 12:57:43,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:43,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 12:57:43,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:43,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:43,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:44,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:44,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:44,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175861382] [2020-10-11 12:57:44,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:44,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:44,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:44,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:44,217 INFO L87 Difference]: Start difference. First operand 356 states and 952 transitions. Second operand 19 states. [2020-10-11 12:57:45,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:45,334 INFO L93 Difference]: Finished difference Result 481 states and 1200 transitions. [2020-10-11 12:57:45,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:57:45,338 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:45,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:45,339 INFO L225 Difference]: With dead ends: 481 [2020-10-11 12:57:45,339 INFO L226 Difference]: Without dead ends: 475 [2020-10-11 12:57:45,339 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:57:45,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-10-11 12:57:45,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 354. [2020-10-11 12:57:45,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-11 12:57:45,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 946 transitions. [2020-10-11 12:57:45,344 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 946 transitions. Word has length 15 [2020-10-11 12:57:45,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:45,345 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 946 transitions. [2020-10-11 12:57:45,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:45,345 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 946 transitions. [2020-10-11 12:57:45,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:45,345 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:45,345 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:45,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2020-10-11 12:57:45,546 INFO L429 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:45,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:45,546 INFO L82 PathProgramCache]: Analyzing trace with hash -2031296288, now seen corresponding path program 268 times [2020-10-11 12:57:45,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:45,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693589183] [2020-10-11 12:57:45,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:45,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693589183] [2020-10-11 12:57:45,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079966207] [2020-10-11 12:57:45,892 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:45,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:57:45,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:45,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:45,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:46,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:46,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:46,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015564488] [2020-10-11 12:57:46,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:46,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:46,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:46,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:46,542 INFO L87 Difference]: Start difference. First operand 354 states and 946 transitions. Second operand 19 states. [2020-10-11 12:57:47,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:47,776 INFO L93 Difference]: Finished difference Result 442 states and 1116 transitions. [2020-10-11 12:57:47,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:57:47,781 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:47,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:47,782 INFO L225 Difference]: With dead ends: 442 [2020-10-11 12:57:47,782 INFO L226 Difference]: Without dead ends: 423 [2020-10-11 12:57:47,782 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:57:47,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-11 12:57:47,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 352. [2020-10-11 12:57:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-10-11 12:57:47,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 940 transitions. [2020-10-11 12:57:47,787 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 940 transitions. Word has length 15 [2020-10-11 12:57:47,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:47,788 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 940 transitions. [2020-10-11 12:57:47,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:47,788 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 940 transitions. [2020-10-11 12:57:47,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:47,788 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:47,788 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:47,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2020-10-11 12:57:47,989 INFO L429 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:47,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:47,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1173375070, now seen corresponding path program 269 times [2020-10-11 12:57:47,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:47,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286625679] [2020-10-11 12:57:47,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:48,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:48,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286625679] [2020-10-11 12:57:48,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620170542] [2020-10-11 12:57:48,411 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:48,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 12:57:48,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:48,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:48,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:49,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:49,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:49,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878753447] [2020-10-11 12:57:49,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:49,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:49,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:49,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:49,278 INFO L87 Difference]: Start difference. First operand 352 states and 940 transitions. Second operand 19 states. [2020-10-11 12:57:50,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:50,448 INFO L93 Difference]: Finished difference Result 456 states and 1147 transitions. [2020-10-11 12:57:50,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:57:50,453 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:50,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:50,454 INFO L225 Difference]: With dead ends: 456 [2020-10-11 12:57:50,454 INFO L226 Difference]: Without dead ends: 450 [2020-10-11 12:57:50,454 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:57:50,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-10-11 12:57:50,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 350. [2020-10-11 12:57:50,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-11 12:57:50,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 934 transitions. [2020-10-11 12:57:50,460 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 934 transitions. Word has length 15 [2020-10-11 12:57:50,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:50,460 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 934 transitions. [2020-10-11 12:57:50,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:50,460 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 934 transitions. [2020-10-11 12:57:50,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:50,460 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:50,461 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:50,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2020-10-11 12:57:50,661 INFO L429 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:50,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:50,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1173345279, now seen corresponding path program 270 times [2020-10-11 12:57:50,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:50,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106567412] [2020-10-11 12:57:50,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:51,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:51,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106567412] [2020-10-11 12:57:51,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059897487] [2020-10-11 12:57:51,085 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 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:51,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 12:57:51,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:51,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:51,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:53,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:53,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:53,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555784839] [2020-10-11 12:57:53,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:53,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:53,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:53,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:53,907 INFO L87 Difference]: Start difference. First operand 350 states and 934 transitions. Second operand 19 states. [2020-10-11 12:57:54,179 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-11 12:57:55,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:55,535 INFO L93 Difference]: Finished difference Result 466 states and 1163 transitions. [2020-10-11 12:57:55,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:57:55,539 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:55,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:55,540 INFO L225 Difference]: With dead ends: 466 [2020-10-11 12:57:55,540 INFO L226 Difference]: Without dead ends: 446 [2020-10-11 12:57:55,540 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=291, Invalid=579, Unknown=0, NotChecked=0, Total=870 [2020-10-11 12:57:55,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-11 12:57:55,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 345. [2020-10-11 12:57:55,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-11 12:57:55,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 919 transitions. [2020-10-11 12:57:55,546 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 919 transitions. Word has length 15 [2020-10-11 12:57:55,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:55,546 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 919 transitions. [2020-10-11 12:57:55,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:55,546 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 919 transitions. [2020-10-11 12:57:55,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:55,547 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:55,547 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:55,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:55,748 INFO L429 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:55,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:55,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1143823359, now seen corresponding path program 271 times [2020-10-11 12:57:55,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:55,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172718840] [2020-10-11 12:57:55,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:55,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:56,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172718840] [2020-10-11 12:57:56,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658818487] [2020-10-11 12:57:56,245 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 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:56,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:56,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:56,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:56,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:56,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663072538] [2020-10-11 12:57:56,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:56,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:56,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:56,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:56,920 INFO L87 Difference]: Start difference. First operand 345 states and 919 transitions. Second operand 19 states. [2020-10-11 12:57:57,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:57,686 INFO L93 Difference]: Finished difference Result 437 states and 1106 transitions. [2020-10-11 12:57:57,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:57:57,690 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:57,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:57,691 INFO L225 Difference]: With dead ends: 437 [2020-10-11 12:57:57,691 INFO L226 Difference]: Without dead ends: 422 [2020-10-11 12:57:57,692 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=214, Invalid=436, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:57:57,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-10-11 12:57:57,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 350. [2020-10-11 12:57:57,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-11 12:57:57,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 928 transitions. [2020-10-11 12:57:57,699 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 928 transitions. Word has length 15 [2020-10-11 12:57:57,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:57,699 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 928 transitions. [2020-10-11 12:57:57,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:57,700 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 928 transitions. [2020-10-11 12:57:57,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:57,700 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:57,700 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:57,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2020-10-11 12:57:57,916 INFO L429 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:57,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:57,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1143822398, now seen corresponding path program 272 times [2020-10-11 12:57:57,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:57,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394363060] [2020-10-11 12:57:57,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:57,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:58,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394363060] [2020-10-11 12:57:58,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131059729] [2020-10-11 12:57:58,413 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 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:58,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:57:58,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:58,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:58,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:59,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:59,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:59,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750817312] [2020-10-11 12:57:59,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:59,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:59,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:59,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:59,135 INFO L87 Difference]: Start difference. First operand 350 states and 928 transitions. Second operand 19 states. [2020-10-11 12:58:00,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:58:00,044 INFO L93 Difference]: Finished difference Result 433 states and 1087 transitions. [2020-10-11 12:58:00,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:58:00,049 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:58:00,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:58:00,050 INFO L225 Difference]: With dead ends: 433 [2020-10-11 12:58:00,050 INFO L226 Difference]: Without dead ends: 417 [2020-10-11 12:58:00,051 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:58:00,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-11 12:58:00,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 349. [2020-10-11 12:58:00,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-11 12:58:00,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 925 transitions. [2020-10-11 12:58:00,056 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 925 transitions. Word has length 15 [2020-10-11 12:58:00,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:58:00,056 INFO L481 AbstractCegarLoop]: Abstraction has 349 states and 925 transitions. [2020-10-11 12:58:00,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:58:00,056 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 925 transitions. [2020-10-11 12:58:00,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:58:00,057 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:58:00,057 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:58:00,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:58:00,258 INFO L429 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:58:00,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:58:00,258 INFO L82 PathProgramCache]: Analyzing trace with hash 439565519, now seen corresponding path program 273 times [2020-10-11 12:58:00,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:58:00,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248780201] [2020-10-11 12:58:00,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:58:00,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:58:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:00,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248780201] [2020-10-11 12:58:00,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366795807] [2020-10-11 12:58:00,879 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 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:58:00,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 12:58:00,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:58:00,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:58:00,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:58:01,537 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:01,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:58:01,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:58:01,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461083463] [2020-10-11 12:58:01,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:58:01,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:58:01,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:58:01,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:58:01,538 INFO L87 Difference]: Start difference. First operand 349 states and 925 transitions. Second operand 19 states. [2020-10-11 12:58:01,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:58:01,828 INFO L93 Difference]: Finished difference Result 394 states and 1001 transitions. [2020-10-11 12:58:01,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:58:01,832 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:58:01,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:58:01,833 INFO L225 Difference]: With dead ends: 394 [2020-10-11 12:58:01,833 INFO L226 Difference]: Without dead ends: 392 [2020-10-11 12:58:01,834 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-10-11 12:58:01,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-10-11 12:58:01,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 357. [2020-10-11 12:58:01,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-11 12:58:01,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 949 transitions. [2020-10-11 12:58:01,839 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 949 transitions. Word has length 15 [2020-10-11 12:58:01,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:58:01,839 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 949 transitions. [2020-10-11 12:58:01,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:58:01,839 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 949 transitions. [2020-10-11 12:58:01,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:58:01,840 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:58:01,840 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:58:02,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:58:02,040 INFO L429 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:58:02,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:58:02,041 INFO L82 PathProgramCache]: Analyzing trace with hash 439566480, now seen corresponding path program 274 times [2020-10-11 12:58:02,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:58:02,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582874501] [2020-10-11 12:58:02,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:58:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:58:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:02,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582874501] [2020-10-11 12:58:02,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006276182] [2020-10-11 12:58:02,507 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 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:58:02,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:58:02,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:58:02,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:58:02,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:58:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:03,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:58:03,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:58:03,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410072084] [2020-10-11 12:58:03,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:58:03,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:58:03,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:58:03,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:58:03,148 INFO L87 Difference]: Start difference. First operand 357 states and 949 transitions. Second operand 19 states. [2020-10-11 12:58:04,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:58:04,065 INFO L93 Difference]: Finished difference Result 420 states and 1064 transitions. [2020-10-11 12:58:04,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:58:04,067 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:58:04,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:58:04,068 INFO L225 Difference]: With dead ends: 420 [2020-10-11 12:58:04,068 INFO L226 Difference]: Without dead ends: 417 [2020-10-11 12:58:04,068 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:58:04,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-11 12:58:04,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 355. [2020-10-11 12:58:04,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-11 12:58:04,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 943 transitions. [2020-10-11 12:58:04,073 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 943 transitions. Word has length 15 [2020-10-11 12:58:04,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:58:04,073 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 943 transitions. [2020-10-11 12:58:04,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:58:04,073 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 943 transitions. [2020-10-11 12:58:04,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:58:04,073 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:58:04,074 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:58:04,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:58:04,284 INFO L429 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:58:04,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:58:04,284 INFO L82 PathProgramCache]: Analyzing trace with hash 439595310, now seen corresponding path program 275 times [2020-10-11 12:58:04,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:58:04,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348620151] [2020-10-11 12:58:04,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:58:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:58:04,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:04,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348620151] [2020-10-11 12:58:04,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26364083] [2020-10-11 12:58:04,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:58:04,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:58:04,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:58:04,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:58:04,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:58:05,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:05,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:58:05,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:58:05,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478483904] [2020-10-11 12:58:05,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:58:05,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:58:05,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:58:05,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:58:05,586 INFO L87 Difference]: Start difference. First operand 355 states and 943 transitions. Second operand 19 states. [2020-10-11 12:58:06,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:58:06,763 INFO L93 Difference]: Finished difference Result 452 states and 1140 transitions. [2020-10-11 12:58:06,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:58:06,767 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:58:06,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:58:06,768 INFO L225 Difference]: With dead ends: 452 [2020-10-11 12:58:06,768 INFO L226 Difference]: Without dead ends: 448 [2020-10-11 12:58:06,769 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:58:06,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2020-10-11 12:58:06,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 353. [2020-10-11 12:58:06,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-10-11 12:58:06,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 937 transitions. [2020-10-11 12:58:06,773 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 937 transitions. Word has length 15 [2020-10-11 12:58:06,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:58:06,773 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 937 transitions. [2020-10-11 12:58:06,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:58:06,773 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 937 transitions. [2020-10-11 12:58:06,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:58:06,774 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:58:06,774 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:58:06,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2020-10-11 12:58:06,975 INFO L429 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:58:06,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:58:06,975 INFO L82 PathProgramCache]: Analyzing trace with hash 440489040, now seen corresponding path program 276 times [2020-10-11 12:58:06,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:58:06,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795552503] [2020-10-11 12:58:06,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:58:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:58:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:07,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795552503] [2020-10-11 12:58:07,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178686585] [2020-10-11 12:58:07,340 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 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:58:07,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:58:07,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:58:07,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:58:07,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:58:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:14,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:58:14,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:58:14,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091692165] [2020-10-11 12:58:14,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:58:14,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:58:14,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:58:14,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:58:14,093 INFO L87 Difference]: Start difference. First operand 353 states and 937 transitions. Second operand 19 states. [2020-10-11 12:58:15,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:58:15,565 INFO L93 Difference]: Finished difference Result 446 states and 1118 transitions. [2020-10-11 12:58:15,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:58:15,571 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:58:15,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:58:15,572 INFO L225 Difference]: With dead ends: 446 [2020-10-11 12:58:15,572 INFO L226 Difference]: Without dead ends: 443 [2020-10-11 12:58:15,572 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:58:15,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-10-11 12:58:15,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 355. [2020-10-11 12:58:15,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-11 12:58:15,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 943 transitions. [2020-10-11 12:58:15,577 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 943 transitions. Word has length 15 [2020-10-11 12:58:15,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:58:15,577 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 943 transitions. [2020-10-11 12:58:15,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:58:15,578 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 943 transitions. [2020-10-11 12:58:15,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:58:15,578 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:58:15,578 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:58:15,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2020-10-11 12:58:15,779 INFO L429 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:58:15,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:58:15,780 INFO L82 PathProgramCache]: Analyzing trace with hash 440490001, now seen corresponding path program 277 times [2020-10-11 12:58:15,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:58:15,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261773237] [2020-10-11 12:58:15,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:58:15,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:58:16,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:16,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261773237] [2020-10-11 12:58:16,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36264069] [2020-10-11 12:58:16,248 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 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:58:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:58:16,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:58:16,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:58:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:19,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:58:19,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:58:19,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437863738] [2020-10-11 12:58:19,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:58:19,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:58:19,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:58:19,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=251, Unknown=1, NotChecked=0, Total=342 [2020-10-11 12:58:19,139 INFO L87 Difference]: Start difference. First operand 355 states and 943 transitions. Second operand 19 states. [2020-10-11 12:58:23,728 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-11 12:58:24,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:58:24,764 INFO L93 Difference]: Finished difference Result 483 states and 1210 transitions. [2020-10-11 12:58:24,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:58:24,769 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:58:24,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:58:24,770 INFO L225 Difference]: With dead ends: 483 [2020-10-11 12:58:24,771 INFO L226 Difference]: Without dead ends: 478 [2020-10-11 12:58:24,771 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=256, Invalid=555, Unknown=1, NotChecked=0, Total=812 [2020-10-11 12:58:24,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-10-11 12:58:24,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 355. [2020-10-11 12:58:24,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-11 12:58:24,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 943 transitions. [2020-10-11 12:58:24,776 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 943 transitions. Word has length 15 [2020-10-11 12:58:24,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:58:24,776 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 943 transitions. [2020-10-11 12:58:24,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:58:24,776 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 943 transitions. [2020-10-11 12:58:24,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:58:24,777 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:58:24,777 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:58:24,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2020-10-11 12:58:24,978 INFO L429 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:58:24,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:58:24,978 INFO L82 PathProgramCache]: Analyzing trace with hash 440518831, now seen corresponding path program 278 times [2020-10-11 12:58:24,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:58:24,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833570926] [2020-10-11 12:58:24,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:58:24,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:58:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:25,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833570926] [2020-10-11 12:58:25,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035400676] [2020-10-11 12:58:25,461 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 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:58:25,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:58:25,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:58:25,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:58:25,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:58:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:26,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:58:26,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:58:26,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127659746] [2020-10-11 12:58:26,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:58:26,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:58:26,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:58:26,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:58:26,278 INFO L87 Difference]: Start difference. First operand 355 states and 943 transitions. Second operand 19 states. [2020-10-11 12:58:27,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:58:27,803 INFO L93 Difference]: Finished difference Result 469 states and 1175 transitions. [2020-10-11 12:58:27,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:58:27,807 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:58:27,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:58:27,808 INFO L225 Difference]: With dead ends: 469 [2020-10-11 12:58:27,808 INFO L226 Difference]: Without dead ends: 465 [2020-10-11 12:58:27,809 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:58:27,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-11 12:58:27,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 351. [2020-10-11 12:58:27,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-11 12:58:27,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 931 transitions. [2020-10-11 12:58:27,814 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 931 transitions. Word has length 15 [2020-10-11 12:58:27,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:58:27,814 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 931 transitions. [2020-10-11 12:58:27,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:58:27,815 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 931 transitions. [2020-10-11 12:58:27,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:58:27,815 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:58:27,815 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:58:28,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2020-10-11 12:58:28,016 INFO L429 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:58:28,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:58:28,017 INFO L82 PathProgramCache]: Analyzing trace with hash 468194670, now seen corresponding path program 279 times [2020-10-11 12:58:28,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:58:28,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559290396] [2020-10-11 12:58:28,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:58:28,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:58:28,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:28,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559290396] [2020-10-11 12:58:28,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720337664] [2020-10-11 12:58:28,438 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 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:58:28,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:58:28,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:58:28,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:58:28,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:58:33,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:33,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:58:33,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:58:33,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165040172] [2020-10-11 12:58:33,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:58:33,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:58:33,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:58:33,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:58:33,175 INFO L87 Difference]: Start difference. First operand 351 states and 931 transitions. Second operand 19 states. [2020-10-11 12:58:34,274 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2020-10-11 12:58:34,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:58:34,982 INFO L93 Difference]: Finished difference Result 440 states and 1101 transitions. [2020-10-11 12:58:34,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:58:34,987 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:58:34,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:58:34,988 INFO L225 Difference]: With dead ends: 440 [2020-10-11 12:58:34,988 INFO L226 Difference]: Without dead ends: 437 [2020-10-11 12:58:34,989 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=312, Invalid=680, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:58:34,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-11 12:58:34,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 354. [2020-10-11 12:58:34,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-11 12:58:35,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 940 transitions. [2020-10-11 12:58:35,003 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 940 transitions. Word has length 15 [2020-10-11 12:58:35,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:58:35,003 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 940 transitions. [2020-10-11 12:58:35,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:58:35,004 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 940 transitions. [2020-10-11 12:58:35,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:58:35,004 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:58:35,004 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:58:35,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:58:35,205 INFO L429 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:58:35,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:58:35,205 INFO L82 PathProgramCache]: Analyzing trace with hash 468195631, now seen corresponding path program 280 times [2020-10-11 12:58:35,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:58:35,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600001989] [2020-10-11 12:58:35,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:58:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:58:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:35,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600001989] [2020-10-11 12:58:35,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777044808] [2020-10-11 12:58:35,607 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 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:58:35,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:58:35,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:58:35,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:58:35,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:58:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:36,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:58:36,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:58:36,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021107618] [2020-10-11 12:58:36,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:58:36,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:58:36,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:58:36,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:58:36,315 INFO L87 Difference]: Start difference. First operand 354 states and 940 transitions. Second operand 19 states. [2020-10-11 12:58:37,405 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-11 12:58:37,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:58:37,995 INFO L93 Difference]: Finished difference Result 478 states and 1194 transitions. [2020-10-11 12:58:37,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:58:37,998 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:58:37,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:58:38,000 INFO L225 Difference]: With dead ends: 478 [2020-10-11 12:58:38,000 INFO L226 Difference]: Without dead ends: 473 [2020-10-11 12:58:38,000 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=291, Invalid=639, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:58:38,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2020-10-11 12:58:38,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 354. [2020-10-11 12:58:38,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-11 12:58:38,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 940 transitions. [2020-10-11 12:58:38,009 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 940 transitions. Word has length 15 [2020-10-11 12:58:38,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:58:38,010 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 940 transitions. [2020-10-11 12:58:38,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:58:38,010 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 940 transitions. [2020-10-11 12:58:38,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:58:38,011 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:58:38,011 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:58:38,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2020-10-11 12:58:38,225 INFO L429 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:58:38,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:58:38,225 INFO L82 PathProgramCache]: Analyzing trace with hash 468224461, now seen corresponding path program 281 times [2020-10-11 12:58:38,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:58:38,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685958366] [2020-10-11 12:58:38,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:58:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:58:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:38,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685958366] [2020-10-11 12:58:38,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775493908] [2020-10-11 12:58:38,585 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 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:58:38,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:58:38,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:58:38,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:58:38,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2020-10-11 12:58:51,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2020-10-11 12:58:51,762 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-11 12:58:51,766 WARN L235 ceAbstractionStarter]: Timeout [2020-10-11 12:58:51,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:58:51 BasicIcfg [2020-10-11 12:58:51,766 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-11 12:58:51,768 INFO L168 Benchmark]: Toolchain (without parser) took 871236.51 ms. Allocated memory was 254.3 MB in the beginning and 237.0 MB in the end (delta: -17.3 MB). Free memory was 209.4 MB in the beginning and 190.0 MB in the end (delta: 19.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.2 GB. [2020-10-11 12:58:51,768 INFO L168 Benchmark]: CDTParser took 0.53 ms. Allocated memory is still 254.3 MB. Free memory is still 230.7 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 12:58:51,769 INFO L168 Benchmark]: CACSL2BoogieTranslator took 645.56 ms. Allocated memory was 254.3 MB in the beginning and 323.0 MB in the end (delta: 68.7 MB). Free memory was 209.4 MB in the beginning and 278.8 MB in the end (delta: -69.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 14.2 GB. [2020-10-11 12:58:51,769 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.49 ms. Allocated memory is still 323.0 MB. Free memory was 278.8 MB in the beginning and 276.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 12:58:51,769 INFO L168 Benchmark]: Boogie Preprocessor took 28.46 ms. Allocated memory is still 323.0 MB. Free memory was 276.3 MB in the beginning and 273.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 12:58:51,769 INFO L168 Benchmark]: RCFGBuilder took 419.25 ms. Allocated memory is still 323.0 MB. Free memory was 273.8 MB in the beginning and 254.5 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. [2020-10-11 12:58:51,769 INFO L168 Benchmark]: TraceAbstraction took 870091.64 ms. Allocated memory was 323.0 MB in the beginning and 237.0 MB in the end (delta: -86.0 MB). Free memory was 254.5 MB in the beginning and 190.0 MB in the end (delta: 64.5 MB). There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 12:58:51,772 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53 ms. Allocated memory is still 254.3 MB. Free memory is still 230.7 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 645.56 ms. Allocated memory was 254.3 MB in the beginning and 323.0 MB in the end (delta: 68.7 MB). Free memory was 209.4 MB in the beginning and 278.8 MB in the end (delta: -69.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 46.49 ms. Allocated memory is still 323.0 MB. Free memory was 278.8 MB in the beginning and 276.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 28.46 ms. Allocated memory is still 323.0 MB. Free memory was 276.3 MB in the beginning and 273.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 419.25 ms. Allocated memory is still 323.0 MB. Free memory was 273.8 MB in the beginning and 254.5 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. * TraceAbstraction took 870091.64 ms. Allocated memory was 323.0 MB in the beginning and 237.0 MB in the end (delta: -86.0 MB). Free memory was 254.5 MB in the beginning and 190.0 MB in the end (delta: 64.5 MB). There was no memory consumed. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 697 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 12 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 20 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 59 PlacesBefore, 20 PlacesAfterwards, 57 TransitionsBefore, 16 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 50 TotalNumberOfCompositions, 943 MoverChecksTotal - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 19 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 869.9s, OverallIterations: 317, TraceHistogramMax: 7, AutomataDifference: 532.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 4177 SDtfs, 36979 SDslu, 32736 SDs, 0 SdLazy, 23353 SolverSat, 9740 SolverUnsat, 63 SolverUnknown, 0 SolverNotchecked, 161.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9315 GetRequests, 1539 SyntacticMatches, 284 SemanticMatches, 7492 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51171 ImplicationChecksByTransitivity, 579.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=357occurred in iteration=309, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 316 MinimizatonAttempts, 20691 StatesRemovedByMinimization, 314 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.8s SsaConstructionTime, 4.8s SatisfiabilityAnalysisTime, 242.3s InterpolantComputationTime, 8278 NumberOfCodeBlocks, 8276 NumberOfCodeBlocksAsserted, 1002 NumberOfCheckSat, 7654 ConstructedInterpolants, 50 QuantifiedInterpolants, 888210 SizeOfPredicates, 306 NumberOfNonLiveVariables, 27877 ConjunctsInSsa, 3212 ConjunctsInUnsatCore, 624 InterpolantComputations, 10 PerfectInterpolantSequences, 42/3948 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown